how much of correspondence costs will be assigned to department A?

Total Costs Activity-cost drivers Act Account inquiry Accounting 4.000.000 lines 60.000 accounts 2.000 letters Correspondence to Total costs 3584.500 The above activities are used by Departments A and B as follows: Department Department Account inquiry hours Accounting lines Account verification accounts Correspondence letters 900,000 lines 12.000 counts 750,000 lines 10,000 accounts O A $6,000 OB. $72.000 OC. $12.000 OD. $6.264