Bonnie purchased a new business asset (five-year property) on March 10, 2018, at a cost of $30,000. She also purchased a new business asset (seven-year property) on November 20, 2018, at a cost of $13,000. Bonnie did not elect to expense either of the assets under 179, nor did she elect straight-line cost recovery. Bonnie takes additional first-year depreciation. Determine the cost recovery deduction for 2018 for these assets. a. $7,858 b. $9,586 c. $21,915 d. $43,000