Post using the standard template. As it currently stands, information is incomplete, and is all over the place, which is probably one of the reasons why nobody's replied yet. You need to state the econ and math courses that you've taken as well the grades obtained. You should also include your GPA for econ and computational math. Psych GPA is borderline irrelevant for PhD admission into economics programmes. In addition, you need to elaborate a little more on the letters you plan on getting; are they all from economics professors or? In what capacity do they know you? All these will inform you of the potential strength of the eventual letter.
To reduce the back and forth, I'll just mention that your likelihood of getting into michigan or wherever, for that matter, is highly dependent on where past candidates with comparable profiles from your school gained admission into (since this will be a reliable proxy of how adcoms, in general, view grades and applicants from your school). Notwithstanding, you have to understand that most applicants have 3.6 GPA or higher, so unless your econ and math GPAs are thereabout, that's a current deficiency in your profile.