Answer:
22
Step-by-step explanation:
1 gross = 12 dozens
1 dozen = 12 copies
1 gross = 12x12 = 144 copies
bought 144 copies for the price $ 2,880
2,880/144 = $20 payed for each copy
for 144 copies made profit $288,
288/144 = $2 was added to the price of each copy
$20+$2 = $22 for each copy
