Bell Company sells several products. Information of average revenue and costs is as follows:

Selling price per unit $28.50

Variable costs per unit: Direct material $5.25

Direct manufacturing labor $1.15

Manufacturing overhead $0.25

Selling costs $1.85

Annual fixed costs $110,000

The company sells 10,000 units What is the proportion of variable costs to total costs?

a. 45.00%

b. 43.59%

c. 53.56%

d. 8.56%

e. 70.18%