GAS-FITTING
12. Following is given the cost of buying and installing the various gas fixtures and pipes that are used in the building under consideration:
Fixtures
Pipe and Fittings
| Quantities and Cost | |
| 54 ft. 1½-inch pipe, at 10 cents | $ 5.40 |
| 30 ft. ¾-inch pipe, at 6 cents | 1.80 |
| 30 ft. ½-inch pipe, at 4 cents | 1.20 |
| 205 ft. ⅜-inch pipe, at 3 cents | 6.15 |
| Fittings | 4.00 |
| Total | $ 18.55 |
Labor
| Labor, assumed to be one-seventh the cost of materials | |
| (fixtures, pipes, etc.) = $335.30 ÷ 7 = | $ 47.90 |
| Summary | |
| Fixtures | $316.75 |
| Pipe and fittings | 18.55 |
| Labor | 47.90 |
| Total cost of gas-fitting | $383.20 |