如何限制相同的数据不显示在刀片​​上的表中?

I'm having trouble to not show same data in the table, but want to sum attributes' values to the old identical data's attributes. I have 6 Models, Purchase, Inventory, Slab, Scarting, floorTile and MarbleType. Purchase and Inventory has One to one relation. Then Inventory further has one to one relation with Slab, Scarting and FloorTile. I'm fetching data using query on Purchase model. i.e.

$slabs = Purchase::where('factoryName', $factoryName)->with('inventory.slab')->get();
{
    "id": 36,
    "marbleType_id": 2,
    "fname": "Sama",
    "lname": "Jojo",
    "factoryName": "Sama Inc.",
    "cnic": "3216542",
    "area": "Johar town",
    "city": "Lahore",
    "province": "Punjab",
    "phone1": "45678912345",
    "phone2": "45678912345",
    "inventory_ID": 10,
    "created_at": "2019-03-19 12:11:45",
    "updated_at": "2019-03-19 12:11:45",
        "inventory": {
        "id": 10,
        "purchase_id": 36,
        "marbleType": "1",
        "totalSquareFt": 25,
        "priceperSquareFt": 230,
        "totalPurchasePrice": 25000,
        "standardSize_ID": "5",
        "salePrice": 250,
        "miliMeter": "6mm",
        "slab_ID": 1,
        "scarting_ID": null,
        "floorTile_ID": null,
        "created_at": "2019-03-19 12:11:45",
        "updated_at": "2019-03-19 12:11:45",
            "slab": {
             "id": 1,
             "marbleName_ID": "2",
             "inventory_ID": "10",
             "created_at": "2019-03-19 12:11:45",
             "updated_at": "2019-03-19 12:11:45"
             }
        }
},
{
    "id": 55,
    "marbleType_id": 3,
    "fname": "Sama",
    "lname": "Jojo",
    "factoryName": "Sama Inc.",
    "cnic": "32165421",
    "area": "Johar town",
    "city": "Lahore",
    "province": "Punjab",
    "phone1": "45678912345",
    "phone2": "45678912345",
    "inventory_ID": 26,
    "created_at": "2019-04-25 10:47:41",
    "updated_at": "2019-04-25 10:47:41",
        "inventory": {
        "id": 26,
        "purchase_id": 55,
        "marbleType": "1",
        "totalSquareFt": 12,
        "priceperSquareFt": 12,
        "totalPurchasePrice": 120,
        "standardSize_ID": "1",
        "salePrice": 15,
        "miliMeter": "6mm",
        "slab_ID": 9,
        "scarting_ID": null,
        "floorTile_ID": null,
        "created_at": "2019-04-25 10:47:41",
        "updated_at": "2019-04-25 10:47:41",
            "slab": {
            "id": 9,
            "marbleName_ID": "3",
            "inventory_ID": "26",
            "created_at": "2019-04-25 10:47:41",
            "updated_at": "2019-04-25 10:47:41"
            }
        }
},
{
    "id": 58,
    "marbleName_id": 2,
    "fname": "Sama",
    "lname": "Jojo",
    "factoryName": "Sama Inc.",
    "cnic": null,
    "area": "Johar town",
    "city": "Lahore",
    "province": "Punjab",
    "phone1": "45678912345",
    "phone2": "45678912345",
    "inventory_ID": 29,
    "created_at": "2019-05-06 09:51:51",
    "updated_at": "2019-05-06 09:51:51",
        "inventory": {
        "id": 29,
        "purchase_id": 58,
        "marbleType": "1",
        "marbleName_id": 2,
        "totalSquareFt": 20,
        "priceperSquareFt": 20,
        "totalPurchasePrice": 400,
        "standardSize_ID": "4",
        "salePrice": 25,
        "miliMeter": "8mm",
        "slab_ID": 10,
        "scarting_ID": null,
        "floorTile_ID": null,
        "created_at": "2019-05-06 09:51:51",
        "updated_at": "2019-05-06 09:51:51",
            "slab": {
            "id": 10,
            "marbleName_ID": "2",
            "inventory_ID": "29",
            "created_at": "2019-05-06 09:51:51",
            "updated_at": "2019-05-06 09:51:51"
            }
        }
},
{
    "id": 56,
    "marbleType_id": 4,
    "fname": "Sama",
    "lname": "Jojo",
    "factoryName": "Sama Inc.",
    "cnic": null,
    "area": "Johar town",
    "city": "Lahore",
    "province": "Punjab",
    "phone1": "45678912345",
    "phone2": "45678912345",
    "inventory_ID": 27,
    "created_at": "2019-05-05 20:11:52",
    "updated_at": "2019-05-05 20:11:52",
        "inventory": {
        "id": 27,
        "purchase_id": 56,
        "marbleType": "3",
        "totalSquareFt": 20,
        "priceperSquareFt": 20,
        "totalPurchasePrice": 420,
        "standardSize_ID": "3",
        "salePrice": 25,
        "miliMeter": "6mm",
        "slab_ID": null,
        "scarting_ID": null,
        "floorTile_ID": 10,
        "created_at": "2019-05-05 20:11:52",
        "updated_at": "2019-05-05 20:11:52",
        "slab": null
        }
},
{
    "id": 57,
    "marbleType_id": 9,
    "fname": "Sama",
    "lname": "Jojo",
    "factoryName": "Sama Inc.",
    "cnic": null,
    "area": "Johar town",
    "city": "Lahore",
    "province": "Punjab",
    "phone1": "45678912345",
    "phone2": "45678912345",
    "inventory_ID": 28,
    "created_at": "2019-05-05 20:32:41",
    "updated_at": "2019-05-05 20:32:41",
        "inventory": {
        "id": 28,
        "purchase_id": 57,
        "marbleType": "2",
        "totalSquareFt": 31,
        "priceperSquareFt": 12,
        "totalPurchasePrice": 400,
        "standardSize_ID": "1",
        "salePrice": 15,
        "miliMeter": "8mm",
        "slab_ID": null,
        "scarting_ID": 4,
        "floorTile_ID": null,
        "created_at": "2019-05-05 20:32:41",
        "updated_at": "2019-05-05 20:32:42",
        "slab": null
        }
},
{
    "id": 59,
    "marbleType_id": 12,
    "fname": "Sama",
    "lname": "Jojo",
    "factoryName": "Sama Inc.",
    "cnic": null,
    "area": "Johar town",
    "city": "Lahore",
    "province": "Punjab",
    "phone1": "12345678945",
    "phone2": "45678945645",
    "inventory_ID": 30,
    "created_at": "2019-05-06 10:14:35",
    "updated_at": "2019-05-06 10:14:35",
        "inventory": {
        "id": 30,
        "purchase_id": 59,
        "marbleType": "2",
        "totalSquareFt": 12,
        "priceperSquareFt": 12,
        "totalPurchasePrice": 122,
        "standardSize_ID": "1",
        "salePrice": 12,
        "miliMeter": "8mm",
        "slab_ID": null,
        "scarting_ID": 5,
        "floorTile_ID": null,
        "created_at": "2019-05-06 10:14:35",
        "updated_at": "2019-05-06 10:14:35",
        "slab": null
        }
}

This query gets all data, and using foreach loop i'm just getting only Slabs' data, Loop is as follows:

foreach ($slabs as $slab) {
   if ($slab->inventory->slab_ID != NULL) {
       $marble_id = $slab->inventory->slab->marbleName_ID;
       $slab->marble = MarbleType::where('id', $marble_id)->get();
   }else {
       $slab->marble = [];
   }
}

As you can at Slab id '1' and '10' both have same marbleName_ID. I'm showing this data on blade in the table format, but i want if specific MarbleName_ID has been iterated through the loop once, and when it comes again in the future iteration then not to show it in the table but Add this Second marbleName_ID's attributes' values (i.e. totalSquareFt and totalPurchasePrice) to previous same marbleName_ID's attributes' values.

Here is the code of blade:

@foreach($slabs  as $slab )
    @foreach($slab->marble as $mar)
        <tr>
            @if($slab->inventory->marbleType == 1)
            <td> Slab </td>
            @endif
            <td>{{ $mar->marbleType }}</td>
            <td>{{ $slab->inventory->totalSquareFt }}</td>
            <td>{{ $slab->inventory->totalPurchasePrice }}</td>
            <td>{{ date('M j, Y h:ia' , strtotime( $slab->created_at )) }}</td>
        </tr>
    @endforeach    
@endforeach

Any help would be highly appreciated.