Last year. HappyBoy reported the following on its income statement, in billions of dollars: - revenue of $113 - COGS of $43.2 - SG\&A expenses of $5.07 - depreciation expense of $23.1 - interest expense of $9.4 - and a tax rate of 38%. Compute the tax shield associated with last year's depreciation expense. Said differently, how much money was saved from depreciation expense? Enter your value in the answer box below, inn billions of dollars