PriceSmart Inc. shares slipped in the extended session Tuesday after the warehouse club chain's quarterly revenue fell short of Wall Street estimates. PriceSmart shares declined 2.4% after hours, following a 1% decline to close the regular session at $59.60. The company reported fiscal second-quarter net income of $23.7 million, or 79 cents a share, compared with $14.1 million, or 47 cents a share, in the year-ago period. Revenue rose to $854.4 million from $839.6 million in the year-ago quarter. Analysts surveyed by FactSet had forecast earnings of 79 cents a share on revenue of $856.7 million.