Can anyone do any better than me on this one?

Pick Up Date: 8/21/14 @ 4 PM
Drop Off Date: 8/24/14 @ 4 PM
Pick Up Location: EWR
Drop Off Location: EWR
Car Class Rented: Full Size (will get 2 free upgrades beyond this)
AWD: K024439 (United Mileage Plus??)
Coupon: MUWA238 ($15 off) - also have MUAA073 (4x United miles bonus if better)
Rate Code
Status: PREFERRED PRESIDENTīS CLUB

I am a Costco member, but never found their rates to be cheaper.

Total including taxes for this rental came to $147.59

Thanks!