TF Company manufactures specialist furniture. It uses a FIFO costing system to allocate costs to Finished Goods and maintains its financial records on a financial year which operates from 1 July 2017 to 30 June 2018. The Work in Process Inventory on 31 May 2018 consisted of the following:+ Job No. Description Units 20,000 25,000 15,000 Storage Equipment Printer Stand Accumulated Cost+ $ 900,000+ 250,000+ 431,000+ $1,581,000+ SE523 PS612 CH421 Chair Total The Finished Goods Inventory at 31 May 2018 was as follows:+ Item Description Quantity and Unit cost 7,500 units at $64 each 21,000 units at $55 each 19,400 units at $35 each 11,200 units at $102each Accumulated Cost+ $ 480,000+ 1,155,000+ 679,000 + Storage Equipment Printer Stand Chair Desk Total At the end of May 2018 the balance in Turramurra Furniture Company's Material Inventory Account was $668,000 .Purchases of Material Inventory during June were $638,000.+ The Raw Material requisitioned for jobs during June were as follows:+ Job No. $+ SE523 155,000 PS612 211,000+ CH421 13,800+ DS174(5000 desks) 252,000+ 1,142,400+ $3,456,400+ Turramurra Furniture Company applies manufacturing overhead on the basis of machine hours. The manufacturing overhead budget for the year totalled $4,500,000 and the company budgeted it would be using 900,000 machine hours.From July 2017 to the end of May 2018 the company has used 830,000 machine hours and its actual manufacturing overhead has amounted to $4,122,000.+ During the month of June 2018 machine hours, labour hours and labour cost was as follows:+ Job No Machine Hours Labour Hours Labour Cost+ 11,600 $ 122,400+ 14,300 200,500+ 3,600 43,200+ 12,500 3,000 SE523 PS612 CH421 DS174 Indirect labour Supervision 12,000 19,500 SES523 PS612 CH421 DS174 Required: 4,400 14,000 138,000 + 29,400+ 57,600+ Total 49,900 45,000 591,100 The jobs completed in June 2018 and the unit sales during June 2018 were as follows:+ Job No Description Quantity completed Unit sales+ 19,000 0 14,000 5,000 Storage Equipment Printer Stand Chairs Desks 17,500+ 18,000+ 21,000+ 6,000+ (a) Describe the circumstances when a job order costing system should be used + (b) Calculate, showing working, the balance in Turramurra Furniture Company's Work in Process + Account at 30 June 2018. (c) Calculate the cost of the chairs in the Finished Goods Inventory at 30 June 2018+ (d) Actual manufacturing overhead incurred in June amounted to 246,000 .Calculate the over or underapplied overhead for the year.+