Subject: car rental coupon
Does this make sense to anyone? I reserved a intermediate car from National with a 2 class upgrade coupon to a full size for a total of 76$. This is for 3 days and includes taxes. I wanted to see what the price was for an intermediate without the coupon and it's 197$. For the full size that it wound up with it's 204$.

Avis was the opposite. Without a coupon the rate for an intermediate was 88$. Full size was 102$. With the double upgrade coupon intermediate is 220$ and full size was 236$.

What gives?

Mary from MO