A certain sum amounts to ₹13860 after 5 years and to ₹16776 after 8 years at the same rate per cent per annum at simple interest. What will be simple interest (in ₹) on a sum of ₹20,000 for $$3\frac{2}{3}$$ years at the same rate?

A

7344

B

7434

C

6374

D

6473