Determine the missing amounts in each of these four separate situations a through $d.$

$\backslash$table$[[,,,,$b$,,$c$,$d$],[$Supplies available$-$prior year$-$end,$$,475,$$$,2,518,$$$,2,140,],[$Supplies purchased during current year,,$3,325,,8,561,,,9,161],[$Total supplies available,,$3,800,,11,079,,,],[$Supplies available$-$current year$-$end,,$(925),,,,(2,620),(800)],[$Supplies expense for current year,,$1,,2,218,,16,413,9,736]]$