How much of this will I need to do a 12 week cycle...of 500

[FireGuy]

so are you saying you think he needs 3??

and then 3 would be the number of the count
and the count would be 3
2 would be right out except when followed by the number 3
4 would be incorrect
but 3 would be it

1.......2..........5 sir.....um no 3

(monty python and the holy grail reference)

But if he goes with 3 T-Mos wont he have some left over? You guys are confusing me now.