Answer: Variable cost; should be considered
Step-by-step explanation:
For a nail salon, the costs associated with the purchase of nail polish and other products like polish remover and disposable flip flops are examples of variable costs. These should be considered when building a MCS.
Variable costs are the costs that varies with production. They are the opposite of fixed costs which are fixed. The nail polish and other products like polish remover and disposable flip flops are variable costs because the amount that'll be bought depends on the available customers and therefore isn't fixed.