Excel (value) error question.

[GILLAN]

I am trying to figure pricing based on qty and height x length, but also have the value subject to a minimum. So in this example I have a quantity 4 with the length (3) x height (2). The price is based on another formulas that takes the 6 x 1.20 to give you the 7.2 but the minimum charge is 10.00.
I created the formula below, but it gives me an value error. If anyone could help point me in the right direction, it would be great.



QTY LENGTH HEIGHT TOTAL SIZE
4 3 2 6


CHARGE PER FORMULA CHARGE SUBJECT TO MINIMUM
7.2 #VALUE!


=IF(A4<3,E4<10,10),IF(A4<11,E4<8,8),IF(A4<35,E4<7.5,7.5),IF(A4<71,E4<7.25,7.25),IF(A4<143<6.5,6.5)