The following costs were for Clear Vision Incorporated, a contact lens manufacturer:

Output Fixed Cost Variable Cost Total Costs

$650$ $ $5,200$ $ $33,150$ $ $38,350$

$7005,20035,70040,900$

$7505,20038,25043,450$

$8005,20040,80046,000$

At an output level of $675$ lenses, per unit variable cost is calculated to be: