Abboud Company is planning to introduce a new product with an 80 percent learning rate for production for batches of 1,000 units. The variable labor costs are $30 per unit for the first 1,000-unit batch. Each batch requires 100 hours. There are $10,000 in fixed costs not subject to learning. Refer to Figure 3-9. What is the cumulative total time (labor hours) to produce 6,000 units based on the cumulative average-time learning curve?

a. 100 hours

b. 256 hours

c. 160 hours

d. 307 hours

I know the answer is D but can get the calculation correct