ROUNDUP Residents here are outraged with the owner of the only gas station in town after gas prices soared to $4.59 this week, nearly 40 cents above the statewide average.Roundup has one functioning gas station, Phillips 66 at 701 First Ave. W., after the town's other station, Conoco at 806 Main St., closed for renovations two weeks ago.Watch the report: Amid spike, Roundup drivers cry price gouging at lone gas stationThat's not a way to conduct…