Tiered Pricing Formula Help

Hi, I need some help with a tiered pricing formula. I've looked through several threads but haven't found anything that fits my need.

Per the attached spreadsheet, I need a formula that will provide a the total price as follows...

Number of Users:

Number of Users Price Total
Up to 250 $840
251-500 $756
501-1,000 $672
1,001-2,000 $552

If 1,000 users is entered, a price of $735,000 should display in the 'Total' cell on the 501-1000 line. The first 250 users * $840, the next 250 users * $756, and the last 500 users * $672 for a total price of $735,000. A $0 amount should be displayed in the rest of the 'Total' cells.


Thanks in advance for any help you can provide!!!