Answer:
d. 80%
Explanation:
In case when the volume of the production doubles, also the direct labor cost decreased by 20% so the learning curve is 80% as the labor cost is fall by 20% so the remaining percentage i.e.
= 100% - 20%
= 80%
Would be considered as a learning curve and the same is to be considered
Therefore the correct option is d. 80%
