Current Attempt in Progress 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+$3x y - $0+$13x y $10,400+$1x Milo, the owner, has determined that direct labor is the cost driver for all three categories of costs. (a) Prepare a flexible budget for activity levels of 510, 590, and 660 direct labor hours. (List variable costs before fixed costs.) RENSING GROOMERS Flexible Budget