below is a list of various costs of producing sweatshirts. Classify as variable, fixed or mised cost

a. Electricity costs of $0.025 per kilowatt-hour.
b. Warehouse rent of $6,000 per month plus $0.50 per square foot of storage used.
c. Thread.
d. Lubricants used to oil machinery.
e. Janitorial costs of $2,000 per month.
f. Advertising costs of $10,000 per month.
g. Sales salaries.
h. Color dyes for producing different colors of sweatshirts.
i. Salary of the production supervisor.
j. Straight-line depreciation on sewing machines.
k. Patterns for different designs. Patterns typically last many years before being replaced.
l. Maintenance costs with sewing machine company. The cost is $2,000 per year plus $0.001 for each machine hour of use.
m. Property taxes on factory, building, and equipment.
n. Cotton and polyester cloth.
o. Hourly wages of sewing machine operators.