Doesn’t work correctly – Fuel Cost Calculator & Tracker Review

As simple as entering information is this app does not seem to calculate correctly. Simply entering how much per gallon and how many gallons results in a number that has no relevance to that current fill up. Unless I’m missing something and I’m more than willing to have someone explain it to me. If I find out I’m in the wrong I’ll change the rating gladly.
Review by Jonnie8 on Fuel Cost Calculator & Tracker.