Writing Formulas in Excel

I need my pool cleaned. I have received estimates from three companies on how long it would take them to clean my pool. They have also told me how much they charge per hour. I want to find the best value. What formula would I enter into D3?

• =$50*C3
• =$50+C3
• =B3+C3
• =B3*C3

I have a chart of my monthly bills. I want to know the total cost of my utilities for the month. What formula would I enter into D6?

• =SUM(D3:D5)
• =104.23+80.00+5.04
• =D3-D4-D5
• =MAX(D3:D5)

I have a lawnmowing service. I want to find the amount I should charge each customer. Which formula would I enter into C3?

• B3+20
• =B3+20
• =20*(B3+B4+B5)
• =B3*20

I am buying some items online. I want to find the total cost of each item. Which formula(s) would I enter into C2?

• =8.25*B2
• =8.25%*B2+B2
• =8.25/B2+B2
• =SUM(B2:B4)

I own a furniture store. Each customer made a purchase, and then made payments toward that purchase. I want to find out how much each customer still owes. Which formula would I enter into D3?

• =B4-C4
• =B3-C3
• =B3+C3
• B3-C3