E22-12 Solo, Inc., manufactures two styles of climbing shoe-the Mountaineer and the Pro Mountaineer. The following data pertain to the Mountaineer: Variable manufacturing cost. $ 70 Variable operating cost. Sale price.. 20 160 Solo's monthly fixed expenses total $140.000. When Mountaineers and Pro Mountaineers are sold in the mix of 7:3, respectively, the sale of 2,000 total pairs results in an operating income of $60,000. Compute the contribution margin per pair for the Pro Mountaineers.