Answer:
The  The number of sweatshirts the company would need to sell to earn a target profit of $1,710 is closest to 570 sweatshirts.
Explanation:
This can be calculated as follows:
Selling price per unit = $15
Total cost price per unit = Average unit cost + Sales commission per unit = $7 + $5 = $12
Profit per unit = Selling price per unit - Total cost price per unit = $15 - $12 = $3
Target profit = $1,710
Number of sweatshirts to sell to earn a target profit = Target profit / Profit per unit = $1,710 / 3 = 570