10) Salt Spring Island Cottons manufactures shirts and other cotton clothing. A special orca design t-shirt requires the following: Direct materials standard 0.9 square metres at $1.50 per metre Direct manufacturing labour standard 0.25 hours at $14.00 per hour During the third quarter, the company made 7,500 t-shirts and used 8,250 square metres of fabric costing $11,550. Direct labour totaled 1,650 hours for $23,265. Required: a. Compute the direct materials price and efficiency variances for the quarter. b. Compute the direct manufacturing labour rate and efficiency variances for the quarter