Could you please showcase the necessary formulas and explain how to work these questions out? Thank you so much 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? a. 2.0 b. 2.5 c. 3.0 d. 3.5 e. 4.0 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? a. $37.50 b. $112.50 c. $125.00 d. $187.50 e. $200.00 a. 13. ABC Supply sold inventory that it had purchased from TAMKO. The total cost of the merchandise was $50,000 plus shipping costs of $1,500. If the total sale of this inventory netted $80,000, what was the gross margin percentage? 20.00% b. 23.33% 35.63% d. 37.50% 54.55% c. e