Answer:
A. $ 9 comma 050
Step-by-step explanation:
The operating income(loss) of a business is the result of the sales less operating costs. The operating cost is made up of the fixed cost and the variable cost.
If the Sales is more than the operating cost, the business makes an income otherwise, a loss.
Sales = $5 * 4200
= $21,000
Operating cost = $1.25 * 4200 + $6,700
= $11,950
Operating income(loss) = $21,000 - $11,950
= $9,050