(Reuters) – Troubled electronics retailer RadioShack Corp said it may need to file for bankruptcy if its cash situation worsens, after reporting its tenth straight quarterly loss. RadioShack, whose sales have been in a free-fall since 2010, said it was working with its lenders and landlords to restructure its debt and cut costs. RadioShack stores, which have been around for more than 90 years, were once the go-to shops for budding innovators and engineers for products that ranged from vacuum tube speakers to the first mass-produced PC.