Kokomo produces a mint syrup used by gum and candy companies. Recently, the company has had excess capacity due to a new competitor entering its market. Kokomo is currently bidding on a potential order from Quality Candy for 4,900 cases of syrup. The estimated cost of each case is $22.90, as follows: The predetermined overhead rate is $1.76 per direct labor dollar. This was estimated by dividing estimated annual overhead ($1,058,400) by estimated annual direct labor ($588,000). The $1,058,400 of overhead is composed of $264,600 of variable costs and $793,800 of fixed costs. The largest fixed cost relates to depreciation of plant and equipment. (a) With respect to overhead, what is the opportunity cost of producing a case of syrup? (Round answer to 2 decimal places, e.g. 15.25.)