X Ltd. has purchased and issued the materials in the following order:

   

Unit

Unit Cost

     

Rs

 1st January  

 Purchased  

300

3

 4th January  

 Purchased  

600

4

 6th January  

 Issued  

500

 

 10th January  

 Purchased  

700

4

 15th January  

 Issued  

800

 

 20th January  

 Purchased  

300

5

 23rd January  

 Issued  

100

 

Ascertain the quantity of closing stock as on 31st January and state what would be its value (in each case) if issues were made under the following methods:

(i) Average cost.

(ii) First in First out.

(iii) Last in First out.