Branch // A: A contracting was referred to a contracting company for 102 million dinars. The contractors estimates in the submitted bid included expected profits of 20% of the total cost of the work. The contractor deserves an advance each month for the value of the completed works, deducts from them the insurances, and these insurances are returned in accordance with the general conditions for civil engineering contractors. The procedures for checking and disbursing advances take one month between the contractors maturity date and the date of actually receiving them. Find the largest amount the contractor will need to provide and the date on which he will need it.

Details Time (M) 1 2 3 4 5 6 Monthly Value 12 18 24 6 30 12 Details Time (M) 1 2 3 4 5 6 Monthly Value 12 18 24 6 30 12