India, June 14 -- Wholesale price-based inflation slipped to 22-month low at 2. 45% in May helped by falling prices of food articles fuel and power items according to an official data.The Wholesale Price Index (WPI)-based inflation was at 3.07% in April. It was 4.78% in May 2018.Inflation in food articles basket was 6.99% down from 7.37% in April.However onion prices spiked during the month with inflation at 15.89% as against (-) 3.43% in April.Vegetables inflation eased to 33.15% in May down from 40.65% in the previous month. Inflation in potato was (-) 23.36% against (-) 17.15% in April.WPI inflation in May is the lowest in 22 months since July 2017 when it was at 1.88%.Inflation in 'fuel and power' category cooled to 0.98% from 3.84% las...