Phil and Joan Crawley made the following payments during the current year: Interest on bank loan (loan proceeds used to purchase U.S. Series EE savings bonds) $4,000 Interest on installment charge accounts 500 Interest on home mortgage for period April 1 to December 31 2,700 Points paid to obtain conventional mortgage loan on April 1 900 The Crawleys had net investment income of $3,000 for the year. What is the maximum amount that the Crawleys can deduct as interest expense in calculating itemized deductions for the current year? A. $3,600 B. $6,600 C. $7,600 D. $8,100