Rensing Groomers is in the dog-grooming business. Its operating costs are described by the following formulas: Grooming supplies (variable) Direct labor (variable). Overhead (mixed) y $0+$5x y- $0 +$12x Y- $9,500+$2x Milo, the owner, has determined that direct labor is the cost driver for all three categories of costs. *450 470 and 200 direct labor hours list variable costs before fixed costs.) RENSING GROOMERS Flexible Budget (c) Calculate the total cost per direct labor hour at each of the activity levels specified in part (a). (Round answers to 2 decimal places, e.g. 10.25.) Activity level 11 $ Activity level 2 $ Activity level 3 $