A company makes a single product on two separate production lines, A and B. Its labor force is equivalent to 800 hours per week, and it has $3100 outlay weekly on operating costs. It takes 1 hour and 6 hours to produce a single item on lines A and B, respectively. The cost of producing a single item is $5 on line A and $3 on line B. (Let the $x$ refer to the number of items on line A and $y$ refer to the number of items on line B.)
(a) Write the inequality that expresses the labor information.
(b) Write the inequality that expresses the cost information.