If the code matrix is 
, find the matrix that can be used to decode the message 47, 36, 35, 28, 92, 69, 63, 93, 74, 56, 71, 57, 17, 17, 16. (Because A and A-1 are 3 × 3 matrices, use triples of numbers.)
Definitions:
Periodic Inventory System
An accounting method where inventory is physically counted at specific intervals, typically at the end of an accounting period, to determine the cost of goods sold and ending inventory.
Perpetual Inventory System
An inventory accounting method where transactions are recorded on the spot with the help of computerized point-of-sale systems and enterprise asset management tools.
Trade Discount
A reduction in the listed price of goods or services offered by sellers to buyers as an incentive or for bulk purchases, not recorded separately in financial books.
Catalog List Price
The advertised price of a product or service in a catalog, before any discounts or promotions.
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