How many macdonalds free coffee vouchers would I need to keep me in coffee?

soledog: How many macdonalds free coffee vouchers would I need to keep me in coffee?
Every time you buy a coffee from Macdonalds, you get a sticker to put on a card. 6 stickers(1 card) = 1 cup of coffee (including another sticker).

My manager reckons its possible to save up enough so that he’ll never have to buy again. Is he right? if so, how many.

Im not saying what he thinks yet as i dont want to influence anyone.

Answers and Views:

Answer by matt
You could never have enough vouchers to not ever need to pay for coffee indefinitely. You only get one free sticker for every 5 you purchase after your first free coffee. The best you could do is after the first free cup which you had to purchase 6 to get, now you only have to purchase 5 to get it.