Raising money??!??!!?!?!?!?!?!?

okay so im in the band and we had to raise $420 each to cover the costs of our uniforms and buses and stuff. well i raised a little over 78 bucks and thats it. i have to pay $322 by may so that i can go to the annual band banquet! i need ideas to get some money so i can pay off the $322!! help!!! thanks guys! :)