Determine the missing amounts in each of these four separate situations a through d. a b $ 475 $ 2,518 $ 2,140 3,325 9,161 Supplies available-prior year-end Supplies purchased during the current year Total supplies available Supplies available-current year-end Supplies expense for current year 8,561 11,079 3,800 (925) (2,620) 16,413 (800) 9,736 2,218