Algebra question

Question

-What is the profit of making 4500 units of a certain product if the fixed cost is $850, the cost of producing each unit is $9.50 and each unit sells for $12?

Answer 1

850 + 4500 * 9.50 = 43600 is the total cost

43600/4500 = 9.68 is the cost for one item

the sales revenue is 12 * 4500 = 54000

The profit is 10400

10400/4500 = $2.31 each