A company makes two different types of pen drives XZ and YZ. The total expenses during the period as shown by the books – 600 of XZ and 800 of YZ – are as follows:

Material

99,000

Direct wages

6,000

Stoves overheads

9,900

Running expenses of machine

2,200

Depreciation

1,100

Labour amenities

750

Works general

15,000

Administration and selling

13,400

Other date available to you

XZ : YZ

Materials cost ratio per unit

1 : 2

Direct labour ratio per unit

2 : 3

Machine utilization ratio per unit

1 : 2

Calculate the cost of each pen drive per unit giving reasons for the basis of apportionment by you.