Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the correct order to form a meaningful and coherent paragraph.
P. The prices of cooking gas, pulses and vegetables have registered a sharp rise.
Q. In recent years the prices of essential commodities have gone up sharply.
R. The low-income groups and the salaried classes are the worst sufferers.
S. Living has become quite a costly affair these days.