There are not only direct costs but also fixed and variablecost when calculating cost of production.
在产品成本中不仅仅包括直接费用， 而且还包括固定和变动间接费用。
2
The multi-rate variable well testing can weaken wellbore storage, shorten test time and economize the cost of test, and the contradiction between test and production is also solved to some degree.
Applying Cobb-Douglas Production Function and the time variable, the author creates a metrological model of staff turnover cost for precise calculation as well as positive studies.