I have this missing amounts problems, I need to find the answer with the procedure that you come out with the answer of each of them.

Determine the missing amounts in each of these four separate situations a through d. (Omit the "$" sign in your response.) a b c d Supplies availableprior year-end $ 300 $ 1,600 $ 1,360 ? Supplies purchased during the current year 6,000 Supplies availablecurrent year-end 800 Supplies expense for current year 6,575 2,100 5,400 750 ? ? 1,300 ? 1,840 9,600