Answer:
Austing needs 160 boxes to complete the rack.
Explanation:
Givens
- 12 cereral boxes occupies 60 centimeters of shelving.
- The rack has 10 meters of shelving, equivalent to 1000 centimeters.
- 2 meters are already used.
- There are 800 centimeters of shelving remaining.
To find the total number of cereal boxes needed to use the whole rack, we just need to use the rule of three: If 12 cereal boxes occupies 60 centimeters of shelving, 800 centimeters would require how many cereal boxes

Therefore, Austing needs 160 boxes to complete the rack.