All orders are printed in batches. Generally orders are batched as follows:

If you want a different quantity (for example 400) – it is generally more cost effective to order 500 quantity (with 100 extras) than it is to order 4 sets of 100. For quantities over 1000, it is generally more cost effective to order offset output.

Quantities cannot be split; the entire quantity for the set will have the same printing (unless you have ordered a Digital Output product with Dynamic Printing).