Problem 9-18 (Algo) Activity and Spending Variances [LO9-1, LO9-2, LO9-3] You have just been hired by FAB Corporation, the manufacturer of a revolutionary new garage door opening device. The prosident has asked that you review the compony's costing system and "do what you can to help us get betier control of our manufocturing overheod costs." You find that the company has never used a flexble budget, and you suggest that preparing such a budget would be an excelent first step in overhead planning ond control. After much effort and analysis, you determined the following cost formulas and gathered the following actual cost dota for March During March, the company worked 18,000 machine hours and produced 12,000 units. The company had originally planned to work 20.000 machine-hours during March Required: 1. Calculate the activity variances for March. 2. Caiculate the spending yariances for March. Complete this question by entering your answers in the tabs below. Calculate the activity variances for March. (Indicate the effect of each variance by selecting "F" for favorable, "U*" for unfavorable, and "None" for no effect (1.e., zero variance). Input all amounts as positive values.). 1. Calculate the activity variances for March. 2. Calculate the spending variances for March. Complete this question by entering your answers in the tabs below. Caiculate the spending variances for March. (Indicate the effect of each variance by selecting F F for faverable, "U for. unfavorabie, and "None" for no effect (i.e,, tero variance), Input all amounts as positive values.)