Answer:
Total cost for 316 returns $3,962
Total cost for 408 returns $4,974
Total cost for 524 returns $6,250
Explanation:
The total cost incurred by Pharoah with the Mega Tax software is given by the fixed cost of $486, referring to the annual fees, added to the cost per tax return of $11 multiplied by the volume of returns filed (n):

i. if 316 returns are filed? (n = 316)

ii. If 408 returns are filed? (n = 408)

iii. If 524 returns are filed? (n = 524)

Total cost for 316 returns $3,962
Total cost for 408 returns $4,974
Total cost for 524 returns $6,250