You have just been hired by FAB Corporation, the manufacturer of a revolutionary new garage door opening device. The president asked you to review the company's costing system and 'do what you can to help us get better control of our manufacturing overthead costs." You find the company has never used a flexible budget, and you suggest preparing such a budget would be an excellent first step in overhead planning and control, After much effort and anaiysis. you estimated the following cost formulas and gathered the following actual cost data for March: During March, the company worked 14,000 machine hours and produced 8,000 units. The company originally planned to work 16,000 machine-hours during March. Required: 1. Calculate the activity variances for March. 2. Calculate the spending variances for March