Stocks of cement on a construction site are allowed to run down to a level of 3 tonnes before being replenished. Cement is used steadily at 50 tonnes per week. Cement costs 15 Euro per tonne and the...

Stocks of cement on a construction site are allowed to run down to a level of 3 tonnes before being replenished. Cement is used steadily at 50 tonnes per week. Cement costs 15 Euro per tonne and the cost of storage and deterioration per week is 10% of the cement price. Each time cement is ordered, there is a cost of processing this order of 1 Euro.How much cement should be ordered each time?What is the cost of ordering and storing the cement?