How can I make an estimate/quotation without getting the final summ?

I need to give a customer price for 1000, 5000 and 10000 flyers.

I have to create 3 different items (making reverse counting to get the pricer per unit) and, after that, the estimate includes the price or the three items added...

Is there a way to avoid this so I can type directly the costs with no cost per unit and no summing at the end?

Like this:

1000 flyers 200€

5000 flyers 350€

10000 flyers 620€

thx

Kapetan