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.