5. Assume that a company provided the following cost formulas for three of its expenses (where q refers to the number of hours worked): Rent (fixed) $3,000 Supplies (variable)S 4.00q Utilities (mixed) $150 + $0.75q The company's planned level of activity was 2,000 hours and its actual level of activity was 1,900 hours. The actual amount of utilities expense for the period was $1.700. What is the activity variance for utilities expense? A) $50 U B) $125 U C) $75 F D) $75 U