Tippi Company produces lamps that require 2.25 standard hours per unit at an hourly rate of $15.00 per hour. If 7,700 units required 17,550 hours at an hourly rate of $15.20 per hour, what is the direct labor(a)rate variance, (b) diciency variance? For the toolbar, press ALT+F10 (PC) or ALT+FN.F10 (Mac) TTT Arial # 3 (120) + T