Satchel of Gold
From MHWiki
A Satchel of Gold is recovered from mice in Furoma, such as the Kung Fu Mouse, Samurai Mouse, Archer Mouse, Assassin Mouse, Student of the Cheese Claw Mouse, Student of the Cheese Fang Mouse, Student of the Cheese Belt Mouse, Master of the Cheese Claw Mouse, Master of the Cheese Fang Mouse and Master of the Cheese Belt Mouse. It serves no purpose beyond providing bonus gold to the MouseHunter.
Satchels of Gold come in values of 250, 500, 750 and 1000 bonus gold.