Rounding numbers to whole number need equal original

Hello,

Packing to ship 11 cases and the breakdown of boxes is red 20%, assorted 68% and 13% rainbow.

Total Cases Ordered 11.00
Red 2.20
Assorted 7.43
Rainbow 1.38
Special Order 0.00

We can not ship decimal boxes, It has to be a whole number.
Since all the decimals are less than .5 they all get rounded down and you got a total of 10 cases showing. 2 red, 7 assorted, 1 rainbow =10

(all above .5 will round up for 13 total)

I need the three categories red, assorted, and rainbow to be whole numbers and always equal my total cases ordered.

Thanks,

Paul 3