Part 1 is correct, need help with part 2 & 3

Presidio, Inc. produces one model of mountain bike. Partial information for the company follows: Complete Presidio's cost data table. (Round your Cost per Unit answers to 2 decimal places.) Calculate Presidio's contribution margin ratio and its total contribution margin at each sales level indicated in the cost data table assuming the company sells each bike for $620. (Round your Margin Ratio answers to 2 decimal places.) Calculate net operating income at each of the sales levels assuming a sales price of $620. (Round your answers to the nearest whole dollar amount.)