Answer is : 2^(7/6) x^(5/3) y^(1/6)
See attachment file below.
Follow the steps...
Hope it helped!
400/12 = # of dozen needed
.89 * # of dozen needed
400/12=33.33 need 34 dozen
.89*34=$30.26
The long answer is <span>28.571428%, but I would round it upwards to make it seem more realistic.</span>