Building a wooden desk for under $50

Wood Lists 6 - 2" x 4" x 8' 1 - 1" x 12" x 8' My Total was $ ...  ---------------------- 2x4 cuts 2 x  ... " 2 x 21" 2 x 18" 5 x 28" 2 x 14" 2 x 20" 1" x 12" cut in half to get 2 x 48" i ended up not using one 2"x4" so i really only needed 5. -------