The matrix S represent the stock of 2 items in two stores. Matrix O represent the order that each store has placed for these items. Matrices S and O are shown below:

Stocks item Orders item

S = StoreA 8 15 O = StoreA 2 1

StoreB 20 17 StoreB 12 0

When the stores receive their shipments, which matrix represent their current stock?

a) 6 14 b) 196 8 c) 36 47 d) 10 16

8 17 244 20 96 180 32 17

I've multiplied SXO and I got matrix B but it doesn't seem right.

Please help