KINGSTON, Jamaica — Motorists should see an increase at the pumps in the price of gasoline effective Thursday, April 30, according to the latest ex-refinery costs from Petrojam. With both grades of gasoline up by $4.50, 90-octane will be sold for $193.07 per litre, while 87-octane will be sold for $185.63. Automotive diesel fuel will be sold for $193.25 per litre after an increase of $4.50, and ultra-low sulphur diesel...