Doubt for my MTO Scenario?

Hi everyone,

For produce one FG we need that costumer send us your purchase order, after that we create a sales order and we can to start the production processes. We want config MTO process. In CO we are considering the sales stock is valuated, the cost object is production order (not sales order), we want special stock E for FG, the settlement is for production order.

The configuration on my scenario is:

Sales order: Copy of standar order.

Requirement type: KEB

Requirements Classes: KEB ( valuation M it's correct? Or the correct value is A? )

My doubt if is correct to use requirement type KEB in sales order? Or which is the req.type that we need to use.

And other doubt, i don't know why i can't find the item category TAK, i need to turn on some Business Fucntion??

Thanks!!