A partial planning budget and actual results from Market Works Corp. are given below: Planning Actual U=1,200 units U 1,250 units h 800 hours h=820 hours Sales ($500) Wages (512h) Supplies ($0.30u) Maintenance ($400 - $60,000 $9,600 $360 Sales $64,000 Wages $10,200 Supplies $350 Maintenance $2,400 $2h) $2,000 What is the activity variance for Supplies? A. $25 favorable B. $15 favorable OC$15 unfavorable D. $10 favorable