NEED SCRIPT WRITTEN TO TURN SHOPS INTO SERVICES [RPGMVX ACE]

I need a script that will allow specific items to be converted into new exclusive items for a nominal fee. For example, there would be an item ORANGE that you could take to a special shop for pressing. ORANGE JUICE could be "purchased" at this shop for the price of 3 ORANGES and 10G. Or maybe a Bakery where you can "buy" a CAKE for FLOUR, SUGAR, EGG and 500G.

I've been trying to use the mr. trivel basic crafting in conjunction with the variable currency script. Perhaps I just gave up too soon. Thanks.