Swifty Company uses a flexible budget for manufacturing overhead based on direct labor hours. Variable manufacturing overhead costs per direct labor hour are as follows. Fixed ovarhead costs per month are Supervision $3,600, Depreciation $1,200, and Property Taxes $900. The company belizves it will normally operate in a range of 8,50014,200 direct labor hours per month. Assume that in July 2020, Swifty Company incurs the following manufacturing ovarhead cocts. (b) Pre wariabl