Here's another way:
table:
Qty from 0 1000 2000 3000
Qty to 1999 1999 2999 above
price 1,25 1,11 0,97 0,75
data:
consumption price total price
2500 0,97 2425,00
800 1,25 1000,00
1200 1,11 1332,00
2000 0,97 1940,00
1000 1,11 1110,00
3001 0,75 2250,75
2999 0,97 2909,03
5500 0,75 4125,00
B3:E5 holds a pricing table.
A10:A17 is your consumption data.
B10:B17 is your price/qty from the pricing table.
D10
17 is yor total price.
Formula in B10 (copied down to B17):
=HLOOKUP($A10;$B$3:$F$7;3)
Formula in D10 (copied down to D17):
=A10*B10
Hope this helps.
Hans
Sorry for the crap formatting