Determine the missing amounts in each of these four separate situations a through d.
a b c d
Supplies available-prior year-end $ 250 $ 1,325 $ 1,126
Supplies purchased during current year 1,750 4,505 5,105
Total supplies available 2,000 5,830
Supplies available-current year-end (700) (1,606) (800)
Supplies expense for current year 1,025 7,585 5,680