"If the inventory falls short of 10 days, X will pay back the previous month's discount to Y within 30 days of receiving invoice."
I'm wondering why there's no article before "invoice." I think it should be "within 30 days of receiving the invoice" since we are talking about a specific invoice: one in the amount of the previous month's discount.
If one didn't want to use an article, one could write "within 30 days of invoicing/billing," in my opinion.
What do you think?
Thanks a lot!
"Business speak" is often abbreviated to include just the bare facts. Of course the article would make the sentence flow better, but it's not absolutely necessary for communicating the thought.