Given the following data,compute the total error (sum of the error terms). 
Definitions:
Regular Time Cost
The cost associated with employees' wages during their standard working hours, excluding overtime compensation.
Over Time Cost
The additional expenses incurred due to operations extending beyond the normal working hours, including but not limited to wages for overtime work.
Marginal Subcontracting Cost
The increased cost associated with subcontracting an extra unit of production or service.
Layoff Cost
Expenses associated with reducing the workforce, including severance pay, benefits continuation, and related administrative costs.
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