Motley Fool consumer goods analyst Blake Bos takes a look at a company from his own portfolio, RadioShack(RSHCQ), and tells investors what to expect when it reports its earnings tomorrow. With the ailing retailer struggling to return to profitability and compete in a rapidly changing consumer electronics retail space, many are unsure that it has what it takes to turn things around. Blake gives investors three things to watch in tomorrow's conference call that will be key signs for whether a return to profitability is just around the corner or out of reach for good.