You are given the following information about Proton Equipment, Inc. Production- Variances Spending Efficiency Volume 30,000 U Variable manufacturing overhead7,500 F Fixed manufacturing overhead s 28,000 U Read the requirements $ 80,000 U Requirement a. What are the amounts (A) and (B) in the above table? (Complete all answer boxes. Enter a "o* for any zero amounts.) A)is and (B) is $ Requirement b. In a combined 3-variance analysis, what is the total spending variance? (Label the variance as favorable (F) or unfavorable (U)) In a combined 3-variance analysis, the total spending variance is $ Requirement c. What is the total overhead variance? (Label the variance as favorable (F) or unfavorable (U).) The total overhead variance is S