Answer:
Step-by-step explanation:
8.2 - 2.1 = 6.1
$183 / 6.1 = $30 for one sq. ft.
Just to make sure:
8.2 × $30 = $246
$246 / 8.2 = $30
So the contractor originally had 8.2 sq ft of metal and it was worth 246 so to find how much it cost you have to divide 8.2 and 246 which is 30 per sq ft.