A certain bookstore chain has two stores, one in San Franciscoand one in Los Angeles. It stocks three kinds of book: hardcover,softcover, and plastic (for infants). At the beginning of January,the central computer showed the following books in stock.
| | Hard | Soft | Plastic |
| San Francisco | 2,000 | 3,000 | 6,000 |
| Los Angeles | 1,000 | 5,000 | 2,000 |
Suppose its sales in January were as follows: 200 softcover, 400hardcover, and 400 plastic books sold in Los Angeles, and 1,300softcover books, 1,900 plastic books, and 600 hardcover books soldin San Francisco.
(a) Write the given inventory table as a 2 ? 3 matrix.
| | Hard | Soft | Plastic |
| SanFrancisco | | | |
| LosAngeles | | | |
(b) Write the given sales figures as a similar matrix.
| | Hard | Soft | Plastic |
| SanFrancisco | | | |
| LosAngeles | | | |
(c) Compute the inventory remaining in each store at the end ofJanuary.
| | Hard | Soft | Plastic |
| SanFrancisco | | | |
| LosAngeles | | | |
