I misread your sheet; I thought it said 10 Dex, rather than 12.  Which means banded mail, at 93.75 gold, but you'd get the +2 AC still.  Nearly of your advance if you want to go that route, but that's what Senna's suggesting.  No need for the extra hammer.  If not, the 56.25g offer's for chainmail.  +1 to your AC.