Salvadores Manufacturing builds and sells snowboards, skis and poles. The sales price and variable cost for each follows: Product Selling Price per Unit Variable Cost per Unit Snowboards $310 $180 Skis $410 $210 Poles $50 $20 Their sales mix is reflected in the ratio 7:4:2. What is the overall unit contribution margin for Salvadores with their current product mix? Overall Unit Contribution Margin $fill in the blank 1