Difficult# Applications with Matrices

SATSTM-UXTJE9

On day $1$ of Sally's sales trip, she sold $40$ books, $25$ cameras, and $30$ shirts. On day $2$ she sold $20$ books, $30$ cameras, and $15$ shirts. On day $3$ she sold $10$ books, $15$ cameras, and $40$ shirts. If each book cost $\$12$, each camera cost $\$60$, and each shirt cost $\$10$, then which one of the following matrix representations give the total amount of sales from the three items over the three days?