Which of the following is not a variable cost of producing sweatshirts

A) Electricity cost of $0.25 per kilowatt/hour to run sewing machines in factory.
B) Cost of thread.
C) Janitorial cost of $2,000 per month.
D) Wages of production workers.

Variable Cost

Expenses that fluctuate with the level of output, including costs like materials and labor directly involved in the production.

Kilowatt/Hour

A unit of energy equivalent to one kilowatt of power expended for one hour.

Production Workers

Employees directly involved in the manufacturing process, responsible for converting raw materials into finished goods.