Answer:
Explanation:
First of all we have to discover how much he spent. 
356.89 + 2(16.70) + 27.47 = $417.76
Now we have to find how much money he saved 
640 - 417.76 = $222.24 
the total cost of biking outfits must be eqaua or less than $222.24..
We know the price of a single outift so we can write this inequality: 
74.08o ≤ 222.24 
we can find o by dividing the two members of the inequality: 
o ≤ 222.24/74.08 = 3 
o≤ 3 
this mean that he can buy 1, 2 or 3 outfits