Sci Fair Data Do Tom. HELP!!?

I need a measuring scale and 3 types of oranges for my proj. prob. is, i have a soc.st test tom 2. what do i do. i dont have time to do the experiment, and i dont know where to ger a weighing scale from.in order to do the data you have to do the exp. i can find out eprox. how much a val.blood, and navel orange way, and record that on the data...but theres more- so what do i do? :(