Answer:
b) limit the number of free technical-support calls per customer
d) charge a fee per technical-support call
Explanation:
In the case when a company implements the ABC costing so here it identified the profitable group i.e. the high profitable customer would be 30% and the 40% i.e. less profit is considered as a making customer
And, the left balance would be either less or non-profitable
So as per the given situation, the option B and the option D is correct and the same is to be considered