Your Abercrom B Men's Fashion Outlet Has a 60% Chance

Your Abercrom B men's fashion outlet has a 60% chance of launching an expensive new line of used auto-mechanic dungarees (complete with grease stains) and a 40% chance of staying instead with its traditional torn military-style dungarees. Your rival across from you in the mall, Abercrom A, appears to be deciding between a line of torn gym shirts and a more daring line of "empty shirts" (that is, empty shirt boxes). Your corporate spies reveal that there is a 50% chance that Abercrom A will opt for the empty shirt option. The payoff matrix gives the number of customers your outlet can expect to gain from Abercrom A in each situation.
? $\begin{array} { l } \quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\text { Abercrom A }\\\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad \text { Torn } \quad \text { Empty } \\\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\text { Shirts } \quad\text { Shirts }\\\text { Abercrom B } \begin{array} { l } \text { Mechanics }\\\text { Military }\end{array} \left[ \begin{array} { l l } 10&-40\\-30&50\end{array} \right] \\\end{array}$ ?
How many customers can you expect to lose Round the answer to the nearest whole.
?
__________ customers