Sorry that it's confusing.
I've listed 140 chips of each quality. The price on 140 higher quality chips is 245 + 2.40*40 = 341 shipped. The price on 140 lesser quality chips is 185 + 40*1.80 = 257. I would let the combined lot go for $590 shipped.
If you'd like to fill out 3 full racks, I actually have 148 of the higher quality chips and 152 of the lower quality chips, the whole lot of that would be $629 shipped.