The costs for the most recent month at a hair salon are as follows:

Salon rent $ $1,400$

Salon utilities $($electric and water$)*800$

Hairstylists$$ salaries $5,400$

Hairstylists$$ commissions $($a percentage of sales$)3,400$

Depreciation on fixtures and equipment $820$

Shampoo and conditioner $($only a small amount is used on each customer$)310$

Insurance $1,900$

Advertising $2,600$

Store manager$$s salary $3,400$

Hair dye and perm kits $($each dye job or perm uses one kit$)370$

$*$Hint: Assume utilities vary in total according to the number of customers served.