Classify each of the following costs for a jeans manufacturing company as a variable cost, committed fixed cost, or a discretionary fixed cost. Oil and spare needles for the sewing machines. Quality training for employees - typically given for four hours at a time, every six months, for all employees. Advertising in a national magazine for teenage girls. > Natural gas to heat the factory during the winter. The cost of buttons. 1. Variable cost. 2. Committed fixed cost. The cost of landscaping and mowing the grass. The contract with a local mowing company runs from month to month. 3. Discretionary fixed cost. Electricity to run the sewing machines. Food and beverages for the company Canada Day picnic. The salary of summer interns. The cost to lease warehouse space for completed jeans. The lease contract runs for two years at $5,000 per month