Answer:
$105
Step-by-step explanation:
You want to know the savings each month required to cover $450 in airfare and $180 in spending money at the end of 6 months.
The amount that Ethan requires is ...
airfare + spending money
= $450 +180 = $630
If Ethan wants this amount at the end of 6 months, he must save 1/6 of the amount each month:
monthly savings = 1/6 × $630 = $105
Ethan needs to save $105 each month.