** Automotive retailer's shares down 10 pct at C$27.80 in afternoon trading
** Q3 sales and profit miss analysts' estimates, as unemployment levels in Alberta pressure its business
** Says prolonged slump in crude oil prices weighing on consumer spending in Alberta
** Company says "unsure of when the Alberta economy will improve and that the outlook for the retail automotive industry in Alberta remains challenging"
** Says on track to meet its forecast to buy six to eight dealerships by May next year, with the acquisitions mainly in Ontario to prop up growth
** Up to Thursday's close, stock had fallen about 30 pct this year