Recruit or create five new members. Put them all in your party at once. Unequip the weapon and armor they are wearing. Dismiss all five of the newly created people. Go to the shop, and sell the weapons and armor that you just unequipped. Both are worth 10 Entai each, for a total of 100 Entai. The fastest method is to create about fifteen new people at a time, unequip them all, sell the items, then repeat.