Answer :
Given:
Discount price is $558 and the discount percentage is 10%.
Let x be the original amount.
[tex]558=x\times\frac{90}{100}[/tex][tex]x=558\times\frac{100}{90}[/tex][tex]x=\frac{55800}{90}[/tex][tex]x=620[/tex]Therefore,the original cost of the gas grill is $620.