Hi i have a problem with this simple IF statement,

what i want is to calculate one amount (90) for 0-3hrs then multiply by (30)

So the charge for 1,2 or 3 hours will be £90 but then 4 hours £120, 5 hours
£150 etc.

What I have so far is:

=if(N95<=3,90,N95*30) This works fine except if the total in N95 is 0 it is
still showing a charge of £90 which should be £0.00.

Any help on this would be great as i haven't used IF statements in ages.