Colt and Abby go to a berry farm to pick berries. They picked 2 ½ pounds of strawberries and 3 pounds of blackberries. If strawberries cost $0.72 per pound and blackberries cost $0.89 per pound how much is their total cost if sales tax is 5.5%

Long division setup showing an incomplete calculation. 12 is in the divisor, 6839 is in the dividend, and 5 hundreds and 6 tens is written in the quotient. 6000 is subtracted from 6839 to give 839. an unknown value represented by a box is being subtracted from 839. what number should be placed in the box to complete the division calculation?