Samuel and Michelle Kerr share the caps earned from transactions. Their inventory content, however, is not shared. Samuel will not carry weapons, and Michelle will not carry alcohol. Also, caps accumulated via Samuel repairing items are tabulated separately from Michelle's caps on hand.
"When 15 shut down, 95 became the route NCR citizens use to get to the Strip - or limp back home, after the Strip's drained 'em of caps. We get 'em coming and going. Coming, the suckers flush with caps they saved to gamble on the Strip... and going, the same folks, but now they're losers who'll trade you the shirt off their backs so they don't starve before they make it back home. Add in the troopers marching back and forth from McCarran and the Dam, and well, let's just say we don't miss Primm."