How do you give robux on roblox

The person that wants the Robux OBC and well of course you have to have that amount of Robux that they want to make the donation. Ask them to make a donation t-shirt and then if they're some type of Builders Club then they can sell it for a price. (9-14 Tix at any time can be 1 Robux) When you buy they're shirt then they get 90% profit and Roblox gets 10% of what you bought the t-shirt or shirt for.