Each unit of product should use 2 kg of material A, the price of which should be $2.1 per kg. The number of units produced is 8,000. 15,800 kg of material A is used and the price paid is $2.2 per kg. Calculate the price and quantity variances.

a.Price variance: $1,600 favourable Quantity variance: $440 unfavourable

b.Price variance: $1,580 favourable Quantity variance: $420 unfavourable

c.Price variance: $1,600 unfavourable Quantity variance: $440 favourable

d.Price variance: $1,580 unfavourable Quantity variance: $420 favourable