A finance manager has to select one of the bour diferent wppliers of rww materials. The total cost functions under the four cosions ase given below. Assume the qualiy of the raw material to be the same, which of the following is preferred by the finance manager? A. y=250+4.74x B. y=260+4.60x c. y=250+5.42x D. y=250+4.42x If the total cost function is y=6,300+2X, calculate the variable cost for 4,200 units. A. $8,400 B. $12,600 C. $14,700 D. $6,300 The cost function y=1,500+5x A. has a slope coefficient of 1,500 B. is a straight line C. has an intercept of 5 D. represents a fixed cost