I need a formula that sums column C for each "Loc" by "Item"?

A B C
LOC Item WA Txn Value
1241 R3331 595.20
1241 R3334 595.20
1241 R3334 1,488.00
1242 R1400 908.46
1242 R1400 908.46
1242 R3334 1,488.00
1242 R3334 1,190.40
1243 R1400 908.46
1243 R3334 297.60


--
swestberry