Answer:
Nominal Expenditure in Year 1=100*2+50*2=$300
It is equal to real expenditure in year 1 assuming year 1 as base year.
Consmption in year 1 at year 1 prices=$300
Consmption in year 2 at year 1 prices=106*2+54*2=$320
Growth rate at year 1 prices=(320-300)/300=6.6667%
Now let us calculate the consumption at year 2 prices
Consmption in year 1 at year 2 prices=100*2.05+50*1.80=$295
Consmption in year 2 at year 1 prices=106*2.05+54*1.80=$314.50
Growth rate at year 2 prices=(314.5-295)/295=6.6102%
Average Growth rate=(6.6667%+6.6102%)/2=6.6385%
Chain weighted real expenditure in year 2=300+300*6.6385%=$319.92
Step-by-step explanation: