Perfect House Contractors had 3 contracts in progress at 31.12. 2019 Contract Number PH12 PH13 PH14 S S Contract price 638,789 3,354,772 467,615 Costs to date 547,000 756,200 245,450 Estimated costs to complete 28,789 2,681,072 132,165 Payments received on account 638,789 485,600 232,500 Value of work certified 638,789 2,548,000 255,000 Cost of work certified 122,600 1,645,200 195,000 Required a) Access whether any interim profits should be taken on the contracts and calculate them (10 marks) b) Calculate the appropriate turnover and cost of sales value and prepare the financial statements for all the contracts (8 marks)