Question:
In this case I am clearly their ( travel) agent and have built up trust with customers that I am getting them a good deal and since not everyday is equal sometimes I do takah to do get them a the best deal but some deals I have to add on my own commission to make money off it. Also not some deals I need to add on money to make a profit before I process the deal so I quote the customer a certain price before.
For example I see an airline ticket for $300 and but this ticket I do not think I am making commission off of so I tell the customer I am charging him $320; after I process the ticket I see the airline does pay me commission. I am still allowed to charge the customer the additional $20 from the original price which I quoted him from before?
Answer:
Yes you are allowed to charge them the price that they agreed to pay you for the ticket. It is understood that you are not working for free.
Best wishes