My only involvement with bulk mail was several years ago, and the items had to be sorted by zip code (no problem), had to have a permit (no problem), and the amount you paid depended on how many items you were mailing in that batch. If you met the minimum only, then it was $.xx (I think the minimum was 200 pieces). If we hit the next level, like say 500 pieces, the price dropped a little. More you mailed, the less it cost.
If the zip 03305 batch didn't meet the minimum, no discount.
