A. Investors group constructed a concrete block factory its construction cost (1500) million dinar. It is explained that selling price for a thousand blocks is (200000) dinars by studying found that production cost of a thousand tiles reaches (80000) dinar 1

- Find the production quantity that specifying break-even 

- Find the number of years must be gone to return the capital if the maximum power for the factory was 5000 blocks per day. 

B- A machine whose depreciation cost through the fourth year is 18000s and the expected salvage values is 5000S after 9 years find the initial value of the machine by using (S.Y.D) method.