A Senate subcommittee has released a 40-page memo accusing Apple of not paying billions of dollars in federal taxes through "extensive tax-avoidance strategies". Apple CEO Tim Cook, CFO Peter Oppenheimer, and Apple's head of tax operations Phillip A. Bullock will appear in front of the U.S. Senate Permanent Subcommittee on Investigation tomorrow. The company issued a statement earlier today in a preliminary defense against the Subcommittee's accusations. The subcommittee, which previously explored tax avoidance by other multinat