Answer:
Customer will pay $ 6.63552.
Step-by-step explanation:
Given,
The original cost of one box = $ 1.6,
After marking up 60 % the cost of one box = 160 % of $ 1.6
Also, after mark down by 20 %,
The price of one box = (100-20)% of $ 2.56 = 80 % of $ 2.56
Thus, the price of the three boxes = 3 × $ 2.048 = $ 6.144,
Now, tax percentage = 8 %,
Hence, total cost of the boxes after paying the tax = 108 % of $ 6.144