Global News at 6 Regina April 13 2018 6:42pm 01:41 Sask. restaurant sales down 4.5 per cent since PST introduced: Restaurants Canada Saskatchewan has had a PST on restaurant meals for just over a year. The food services industry is still feeling a financial pinch. David Baxter reports. Sask. restaurant sales down 4.5 per cent since PST introduced: Restaurants Canada Responsive site?