Answer:
$3.47
Step-by-step explanation:
Since the price per ounce is the same, we can write the proportion ...
price / ounce = $2.89 / 13 = ?? / 15.625
We can find the amount (??) that Gabe paid by multiplying this equation by 15.625:
?? = $2.89·15.625/13 ≈ $3.47
Gabe paid $3.47 for his chips.