From Section 3.2:

- 25-31 odds only
- 33, 34 (Solution: Cleveland should operate 20 days, Toledo should operate 50 days), 37, 38 (Solution: 8 hours from smelter A, 11 hours from smelter B), 39, 40 (Solution: 80 homes of the first type, 60 of the second type), 41

For the test you should be able to carry out all of the steps to a linear programing problem.