db migration
            $table->decimal('price', 10, 2)->nullable();
            $table->decimal('old', 10, 2)->nullable();
            $table->integer('qty')->nullable();

 backend form
        <div class="col col-sm-6 mb-3">
            {!! Form::label('', __('Price').'*', ['class'=>'control-label']) !!}
            {!! Form::text('price', @$price, ['class'=>'form-control '.(($errors->has('price'))?'is-invalid':'')]) !!}
            @error('price')
            <span class="invalid-feedback" role="alert"><strong>{{ $message }}</strong></span>
            @enderror
        </div>
        <div class="col col-sm-6 mb-3">
            {!! Form::label('', __('New price'), ['class'=>'control-label']) !!}
            {!! Form::text('sale', @$sale, ['class'=>'form-control '.(($errors->has('price'))?'is-invalid':'')]) !!}
            @error('sale')
            <span class="invalid-feedback" role="alert"><strong>{{ $message }}</strong></span>
            @enderror
        </div>
         <div class="col col-sm-6">
                    {!! Form::label('', __('Qty').'*', ['class'=>'control-label']) !!}
                    {!! Form::text('qty', @$qty, ['class'=>'form-control '.(($errors->has('qty'))?'is-invalid':'')]) !!}
                    @error('sale')
                    <span class="invalid-feedback" role="alert"><strong>{{ $message }}</strong></span>
                    @enderror
                </div>


front
priceTrue