Cutting in new trench drains is nasty work. Much easier if there is no floor to begin with. For what it's worth, this is the trench drain system that we have planned: http://www.watts.com/pages/_products...=67&parCat=108 Click the Dead Level D link. It's expensive but saves a ton of labour in installation.
(Total fixed costs + Total variable costs) / Total units produced. The cost per unit should decline as the number of units produced increases, primarily because the total fixed costs will be spread over a larger number of units (subject to the step costing issue noted above).Thus, the cost per unit is not constant.For example, ABC Company has total variable costs of $50,000 and total fixed costs of $30,000 in May, which it incurred while producing 10,000 widgets. The cost per unit is: ($30,000 Fixed costs + $50,000 variable costs) / 10,000 units = $8 cost per unit.hus, the cost per unit is not constant. For example, ABC Company has total variable costs of $50,000 and total fixed costs of $30,000 in May, which it incurred while producing 10,000 widgets. The cost per unit is: ($30,000 Fixed costs + $50,000 variable costs) / 10,000 units = $8 cost per unit.
Average system cost per unit of service, i.e. total cost/hour or total cost. per mile, used for quick calculation, analysis of a new system. This. method will tend to overestimate potential savings of a service cut or. costs of a service expansion since it includes fixed as well as variable. costs. Complex extreme.