Three friends A, B and C invested a total amount of Rs. 90000 in business for the time period in the ratio of 4 : 2 : 3. The amount invested by B and C is in ratio of 5 : 6 and out of total profit of Rs 70000, B got Rs. 4000 for managing the business. Find the amount invested by A, if B got a total share of Rs. 19000