There are two countries and with their currencies denoted as 'A$' and 'B$' respectively. Their nominal exchange rates in terms of US Dollars (USD) are as follows :
A$ 50 = USD 1; B$ 1 = USD 1·5
The nominal prices of petrol per litre in the two countries are A$ 75 per litre and B$ 1 per litre respectively. It is reported that in purchasing power parity (PPP) terms, petrol prices are three times higher in country than in country . Compare a resident of country earning A$ 50,000 per month with a resident of country earning B$ 2,000 per month. In PPP terms
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