Sole Purpose manufactures beach shoes that use a canvas as the main raw material. Data related to the shoes for June follows: Standard quantity per unit of output (yards) Standard Price (SP) per yard Actual materials purchased in yards Actual cost of materials purchased Actual materials used in production (yards) Actual outputs in units 3.5 $7.00 13,500 $89,600 11,000 3,400 What is the materials quantity variance for canvas for June? OA. $17,500 favorable O B. $6,300 unfavorable O C. $17,500 unfavorable O D. $6,300 favorable