Gypsy Joe's operates a chain of coffee stores. The firms pays rent of $10,000 per year for each store. Supplies (napkins, bags, and condiments) are purchased as required. The mangers of each shop are paid a salary of $2,500 per month and all other employees are paid on an hourly basis. The costs of supplies relative to the number of customers in a particular shop and relative to the number of customers in the entire chain of shops is which kind of cost, respectively?

With the data provided, I'm trying to figure out what category of cost the problem above would best fall under.
Variable cost/fixed cost, Fixed cost or fixed cost, variable costs/fixed costs, or variable costs/variable costs.