Seasonal Index - Statistics(Forecasting)

Here's the problem:

The seasonal indices of the sales of garment of a particular type ina certain shop are given below,

----------Quarter -------------Seasonal Index


if the total in the first quarter of a year be worth Rs.20,000 and sales are expected to raise by 5% in each quarter, determine how much of garments of this type be kept in stock by the shop owner to meet the demand for each of three quarters of the year?