My daughter and son play sports and I cover their play and shoot the team and the opponent in hopes of parents purchasing the images. It has worked out fine and I enjoy it. My daughter has joined a new club volleyball team this year. They are new in the fact that this is their first year of operation and have split from another group. ANYWAY, I have the ability to get the contract for the team photo's and the individual photos. My question is, what % should I "give back" to the organization as a contribution/advertising in order to secure the deal. What range or % should I offer?