At the start of the current year, sbc corp. purchased 30% of sky tech inc. for $45 million. at the time of purchase, the carrying value of sky tech's net assets was $75 million. the fair value of sky tech's depreciable assets was $15 million in excess of their book value. for this year, sky tech reported a net income of $75 million and declared and paid $15 million in dividends. the total amount of additional depreciation to be recognized by sbc over the remaining life of the assets is: