Could you please show how these answers are correct? I am having a difficult time understanding these questions. Thank you in advance!

11. If Gross Profit equals 35% for the month, Operating Expenses are equal to 20% of sales for the month, and total employee cost is equal to 50% of Operating Expenses for the month, what is the Personnel Productivity Multiplier for the month? 6 a. 2.0 b. 2.5 c. 3.0 d. 3.5 e. 4.0 a. 12. If a product is purchased by a distributor for $150 and the distributor wants to earn 25% gross margin, what would be the selling price? 7 $37.50 b. $112.50 c. $125.00 d. $187.50 e. $200.00 14. If sales equals $920,000; gross profit equals $140,000; inventory equals $170,000; accounts receivable equals $132,000; and accounts payable equals $113,000 what is the cash conversion cycle in days? a. 52.24 b. 58.44 c. 59.01 d. 79.04 e. 293.86 15. If sales equals $125,000 per quarter and total assets equals $200,000 at the end of each quarter, what is the Asset Turnover for the year? a. 0.156 b. 0.625 c. 2.500 d. 3.250 e. 6.400