If det A =15, det Ax = -15, det Ay = 30 and det Az = -45. Using Cramer's Rule the value of Z is given by: O a. -1 O b. 3 O c.1 O d. -3In inventory control system, which of the following cost is classified as an ordering cost? O a. Cost of production stoppage O b. Transportation cost O c. Interest on capital invested in stock O d. Perpetual inventory costA toy manufacturer uses 45 000 toy wheels per annum. Each wheel cost $8.00 to purchase. If carrying cost is 10% of purchase cost/annum, then the annual carrying cost for the entire stock is O a. 9 000 O b. 36 000 O c. 18 000 O d. 27 000If the forecasted demand for an item is 1 000 units per month and ordering cost is $350 per order, the cost per item is $8.00 and carrying cost are 15% of cost items per annum; then the carrying cost per item per annum is: O a. $1.80 O b. $0.90 O C $1.20 O d. $1.50Given values - 144, -192, and 96 for D, Dy, and Dz respectively and D = 144. Then the solution to the system for x, y and z are: O a. -0.47, -0.63 and 0,30 O b. 0.5, 0.67 and-0.33 O C. 0.73, 0.98 and -0.49 O d. -1. -1.33, and 0.67