Table A: Inventory Stock

Product Store A Store B Store C
X 543 356 643
Y 364 476 419
Z 376 903 409

Table B: July Unit Sales

Product Store A Store B Store C
X 102 78 97
Y 98 87 59
Z 54 89 79

Table A shows the total inventory of three products for three Sports Equipment Corporation stores on July 1. Table B shows unit sales data for the month of July.

If you create a matrix, C, to show the inventory at the end of July, the value of the entry represented by c22 is
.
In a matrix with components aij, which represent unit sales for July, the maximum possible value that a31 can have is
.