The information shown below relating to the ending inventory was taken at lower of cost or NRV from the records of Electronics Corp:

Inventory classification	Quantity	Per unit cost	NRV	Lower of cost or NRV By item	By group	Adjustments write down/up By item	By group
Keyboards
Stock A	12	94	80
Stock B	20	76	70
Stock C	18	100	110
Hard drives
Stock X	30	180	170
Stock X	60	160	180

CD burners

Stock D 60 76 66

Stock E 200 100 116

required: determine the valuation of the above inventory at cost and at lower of cost or NRV, assuming application of lower of cost or NRV valuation by a) individual items, and b) classifications