XY Ltd. purchased and issued materials in the following order:

March 1985

1

Purchased

300 units at Rs 3 per unit

5

Purchased

500 units at Rs 4 per unit

10

Issued

500 units

12

Purchased

700 units at Rs 4.50 per unit

15

Issued

700 units

20

Purchased

300 units at Rs 5 per unit

30

Issued

150 units

Ascertain the quantity of closing stock as on 31 March and state its value under the weighted average cost method.