A Company needs to produce 680 litres of Chemical X. There is a normal loss of 10% of the material input into the process. During a given month the company produced 680 litres and there was an abnormal loss of 5% of the material input into the process. How many litres of material were input into the process during the month?

a-900 L

b-850 L

c-750 L

d-800 L