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

$\backslash$table$[[,$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,,,,$1,025,,7,585,5,680]]$