please help me part b is wrong and also help me for part c thank your

Second Chance Welding rebuilds spot welders for manufacturers. The following budgeted cost data for 2020 is available for Second Chance. Time Charges $210,600 Material Loading Charges Technicians' wages and benefits Parts manager's salary and benefits Office employee's salary and benefits Other overhead Total budgeted costs 54,600 39,000 $304.200 $39.100 11,370 19,600 $70,070 The company desires a $35 profit margin per hour of labor and a 30.00% proht margin on parts. It has budgeted for 7800 hours of repair time in the coming year, and estimates that the total invoice cost of parts and materials in 2020 will be $392,000. (a) Your answer is correct Compute the rate charged per hour of labor. Labor rate $ 74 per hour Labor rate 74 per hour e Textbook and Media Attempts: 1 of 15 used (b) * Your answer is incorrect Compute the material loading percentage. (Round answer to 3 decimal places, e8, 10.501%) Material loading percentage 0.47875 % D. c. Pace Corporation has requested an estimate to rebuild its spot welder. Second Chance estimates that it would require 40 hours of labor and $2,000 of parts. Compute the total estimated bill