Answer:
C
Step-by-step explanation:
The rest are based on time or based on money. (Which you don't know the rate of how often they buy.) I would chose C, if I'm wrong sorry.
Answer: D
Step-by-step explanation: becaus elook at it bitlkjmnjhnnjh
It's B, D, and E.
Hope ok. :)
so first you do the work than check
b
different approach:
see attachment
