The Jibril Company has three product lines of products A, B, and C with contribution margins of $6, $4, and $3, respectively. The president foresees sales of 144,000 units in the coming period, consisting of 24,000 units of A, 72,000 units of B, and 48,000 units of C. The company's fixed costs for the period are $504,000. What is the company's breakeven point in units, assuming that the given sales mix is maintained?
a. 84,000 units
b. 126,000 units
c. 116,308 units
d. 101,250 units