A, B and C completed a work costing Rs. 1800. A worked for 6 days, B for 4 days and C for 9 days.If their daily wages are in the ratio of 5 : 6 : 4, how much amount will be received by A ?

• A. s. 600
• B. s. 750
• C. s. 800
• D. s. 900