81.   Petrol prices doubled on Wednesday in a hike which took place without any prior announcement.

82.   Palm oil, normally seen as good value and regularly bought by developing countries, saw prices double on a decline in the Malaysian and Indonesian harvests.

83.   Prices doubled Wednesday in a hike which took effect without any warning.

84.   Prices have doubled or even tripled in the last few months alone.

85.   Prices have doubled or tripled over the last five years.

86.   Some prices have doubled since January.

87.   Some prices have doubled since the start of the year.