Wirelessly posted (BlackBerry8530/5.0.0.1030 Profile/MIDP-2.1 Configuration/CLDC-1.1 VendorID/417)
"(3 one way segments MIA – EZE @ 50,000 + 3 one way segments MIA- DCA @ 15,000)."
A one-way between MIA and DCA in First Class costs 22,500 Avios each way, not 15,000 Avios. (AA does not offer Business Class on the MIA-DCA route.)