My father served in the logistics branch of Indian armed forces and he had a very particular style of representing the number of items of a certain object. For example, he would use this sentence:
Confirming the receipt of footballs (20 nos) and volleyballs (10 nos). OR Confirming the receipt of footballs (20 numbers) and volleyballs (10 numbers).
Of course I can also say, "Confirming the receipt of 20 footballs and 10 volleyballs", but it changes the emphasis that the sentence puts on the numbers.
I haven't seen this format used outside his military communication, though if I use it, people seem to understand it fine. Is there an internationally accepted way of writing numbers like this?