I’m been making a game about sword fighting, and I’ve recently finished scripting the shop but I have no idea how to make an equip/unequip system in the shop, nor knowing how to save the tools once bought. If I buy two things both of them will be in my inventory, I am a new scripter so I do not know how to deal with this problem am having, also not knowing how to save the tools. Therefore can anyone help me with this? It will be great if you are willingly to help me 
Here’s a part of the code for the shop (I have tried to do the equip system myself but it ultimately failed):
If you need anymore picture of the code, feel free to ask me!