I cannot find a formula that works for tiered pricing. Please help.
1-6000 gals is priced at $3.55 per 1000 gals ($0.00355 per gallon)
6000-25000 gals is priced at $3.95 per 1000 gals ($0.00395 per gallon)
25000 gals and up is priced at $4.40 per 1000 gals ($0.00440 per gallon)
I want to set...