Hi, your formula in columns L, M, and N got messed up. I can't tell exactly what it is supposed to be, but I think that you can get it corrected from your past knowledge and my help. I think the part for when the condition is FALSE got mistyped by using ")" instead of "+", which then lead to other problems.
First, let's look at the formula for the part when the condition is TRUE.
Let's take L3. Although it is a little messed up, I suspect you want the formula to be 20+((J3-10)*2.4) if J3 >10.
J3 = 39, which is greater than 10, so according to the above formula, L3 should be 89.6. But you show 99.56.
Your current formula for a FALSE condition will ALWAYS give the vale of 20! I suspect this is not what you want.
Maybe you want this when FALSE
20+((J3-10)*1.1
Also, use the ABS() function in columns F,G,H,I instead of the formula that you wrote.
And finally, I checked the proposals of the other bidders. I can only laugh, because many of them just did cut-and-paste of generic proposals, and the ones that actually checked the spreadsheet have no idea what is going on. So sad... So I think that I am the only one that can actually get you your formulas back as they should be.