showing profit in POS screen

Hi

I can't see the profit directly in POS screen or in creating sale document

I need to see the profit/cost so I can decide the discount I can give based on it, going into products and calculate item by item cost/sale price is taking loooong time

I need to see that directly so customers in front of me need fast assistance

I'm testing Aronium so I will use it in Phase II

thank you