Please help figure out the budgeted cost per unit. I have a check figure of $21.05, but no idea how it was calculated.

\OPTIMA, INC. General information: Selling price of bamboo rocking horses $33.50 Linear feet of bamboo required per rocking horse 3 Cost of bamboo per foot $2.00 Hours required to build 0.50 Average hourly direct labor rate $15.00 Additional information: Ending finished goods inventory (percentage of the next quarter's sales) 40% Ending raw materials inventory (percentage of the next quarter's production) 30% Quarters/Year Variable manufacturing overhead rate per direct labor hour $8.00 Estimated quarterly fixed manufacturing overhead $275,000.00 4 Estimated quarterly selling and administrative expenses: Variable $6.00 Fixed $200,000.00 Expected number of frames sold in following quarters: 4th Quarter 2019 55,000 1st Quarter 2020 65,000 2nd Quarter 2020 70,000 3rd Quarter 2020 75,000 4th Quarter 2020 90,000 1st Quarter 2021 90,000 2nd Quarter 2021 75,000 Additional information: Cash on hand at January 1st, 2020 $250,000 Percentage of sales in cash 80% Percentage of credit sales collected during quarter of sale 50% Percentage of credit sales collected in quarter following sale 50% Percentage of direct material purchases paid in quarter purchased 80% Percentage of direct material purchases paid in following quarter 20% Depreciation included in quarterly fixed manufacturing overhead $75,000 Depreciation included in quarterly fixed selling and administartive expenses $50,000 Amount expected to be paid for a piece of equipment (purchased in 4th Quarter of 2020) $750,000 Minimum cash balance required $40,000 Borrowing increments $1 Quarterly dividend payments $250,000