Word problem

Question

You currently have 12 Nintendo games on your shelf, and you want to keep a minimum level of 6 games at all times. You average sales of 2 games per day. What is the minimum number you would order for enough games for 7 days?

Answer 1

Day 1

Day 1 have 12, sell 2; order 8 to arrive on day 4

Day 2 have 10, sell 2

Day 3 have 8, sell 2

Day 4 have 6, sell 2, get 8; inventory = 12; order 8 to arrive on day 8

Day 5 have 12, sell 2

Day 6 have 10, sell 2

Day 7 have 8, sell 2

Day 8 have 6, sell 2, get 8; inventory = 12

 

and so on