Hi there, 

There is no way to set up a quantity for a suggested gift. It would be great to be able to do that so for example people have the option of giving a notebook but also can choose to give 5 or x notebooks... the quantity/number of units would multiply the gift and give a total...

Here is an example of form where this would make sense...

https://playingforchange.org/donate/give-an-instrument/