formula that checks a cell for equal or less value

Hello. I'm trying to finish a school project using excel. What I am trying to create is a Inventory/To-Buy receipt/Sales Receipt.

I already have almost everything ready BUT i am missing the knowledge of how to properly set up some functions I want it to have.

Inventory: I have a Minimum quantity, Current Qty, and Required Qty cells. Min and Req Qty are set numbers using the vlookup formula with the Type of Product cell. As soon as I set the type of product it is, it automatically looks up the value of Min and Req Qty.

Now Current Qty is set manually and here is the part where I need help. I have a To Buy cell that would check if the value is equal to or less that Min Qty cell and post itself on the To-Buy receipt with name(or product) and the amount to buy.

I'm really new to excel that is why I resorted to ask for help. If this was the wrong section sorry.