for renting out, its per hour * the car
each car has a different rent per hour (because they are different cars)
I have made a table with the prices and that is joined up to the "Cars" table...
but its getting that calculation on the bookings form....
if i add in the form detail, the prices table, and i run the form - nothing appears on the form at all! the components are there in design view, if i take out the prices table in the form detail, everything is fine...