Earning our own money AND for Breast Cancer HELP! Teenage Girls!?

There is a group of my friends and I, six of us all together, trying to raise money. We want to get this tent but it's two hundred sixty dollars. We could all pitch in and pay for it, but we're making it a goal to raise the money equally in order to buy it ourselves. We are doing a bake sale soon, donations only, and we plan to donate a percentage of all of our earnings to the Susan G Komen Walk for the Cure (Breast Cancer). We aren't doing this solely for us, we do plan to help out there as well. We probably won't earn much with one bake sale, and we don't want to do a car wash. (They are so overdone in our town! No one raises any money off of them.) But we need ideas! We want to raise money but we don't know what to do! Anything we thought of was something like have a dance, but that would require a good amount of money to rent the location. We want to earn more than we spend. Absolutely all money we raise will have a percentage to breast cancer! Just to make sure that is understood. We are a group of teenage girls, some with jobs, some without. PLEASE help with ideas to raise our money!!