I need help with question 3, 4 and 5 a and b please! Thanks!

G. Galo Ltd uses a normal job-order costing to assign costs to products. At the beginning of the year, the company estimated that total overhead costs for the year would be $90,000 and it budgeted total labour-hours of 7,500. Actual labour hours worked for the period January 1 to November 30 were 6,875. On December 1, the company had three jobs in process: WIP at December 1 Job Number 750 751 752 Direct Materials(DM) 700 Direct Labour(DL) 6001200 $1250 $850 300 Manf Overhead(MO)300 Total 675 225 1,375 $1,600 3,125 During the month of December the following costs were incurred by job: Job Number 750 751 752 753 754 $250 450 25 $650 1,530 85 $350 $625 1,980 110 $750 2.970 165 DM DL DL Hours 40 In addition, the company incurred the following actual costs during the month of December $1.245 900 2,600 1,800 4,850 3,900 Plant Depreciation Factory Utilities Advertising Expense Factory Supplies Sales Salaries DM Purchases