(a)[1]
Anya sells every one of these T-shirts to a shop. She asks $\$5$ for each small T-shirt, $\$6$ for each medium T-shirt and $\$8$ for each large T-shirt. Show these prices in a $3 \times 1$ column matrix $N$.
(b(i))[2]
Calculate $P = MN$.
(b(ii))[1]
Explain what the entries of matrix $P$ stand for.
(c(i))[2]
The shopkeeper charges $\$10$ for every men’s T-shirt and $\$9.50$ for every women’s T-shirt. Calculate $(10\;\;9.50)\begin{pmatrix}10&25&30\\20&40&25\end{pmatrix}.
(c(ii))[3]
Work out the percentage profit the shopkeeper makes when all of the T-shirts are sold.