IF statement wont work correctly

Hello, im trying to get this IF statement to work correctly:

=IF(AND(C7=$A$3,D7<$C$3),0,D7*$E$2)

The aim is to display only calculations for tarrif B in tarrif B call charges, but when i drag the formula down it will calculate it for tarrif A and C. (This should make more sense in the attachment)

Hope someone can help me, thanks