The following balances was exgtracted from the books of Oluwalambe Ltd, manufacturer, on 31st December 2007

Stock of raw materials 1 - 1 - 2007	8000
Purchase of raw materials	450000
Stock of raw materials 31 - 12 - 2007	95000
Direct wages	65000
Indirect wages	28000
Depreciation on plants	32000
Factory rent	3500
Work in progress 1- 1- 2007	32500
Work in progress 31 - 12- 2007	37500

Factory overhead cost is