Payment terms 5th 1st prox in days?

Ah, payment terms can be a bit confusing, but let's break it down together. "5th 1st prox" means that payment is due on the 5th of the month following the invoice date or by the 1st of the following month. It's like a friendly reminder to take care of things in a timely manner. Just remember to mark your calendar and you'll be all set!