The standard material input required for 1,000 kgs. of a finished product are given below:

Material	Quantity (Kg)	Standard Rate (per Kg)
A	450	20
B	400	40
C	250	60
	1100
Standard loss	100
Standard Output	1000

Actual production in a period was 20,000 kg. of finished product for which the actual quantities of material used and the prices paid therefore were as under:

Material	Quantity (Kg)	Standard Rate (per Kg)
A	10000	19
B	8500	42
C	4500	65

Calculate (i) Material cost variance; (ii) Material price variance; (iii) Material usage variance; (iv) Material yield variance.