please help

An investor has $60,000 to invest in a $280,000 property. He can obtain either (option A) a $220,000 loan at 9.5 percent for 20 years; or (option B) a $180,000 loan at 8.75 percent for 20 years and a second mortgage for $40,000 at 13 percent for 20 years. All loans require monthly payments and are fully amortizing. How much more would be the effective cost % if you went forward with option A instead of option B. l.e, what is "cost% for A - cost% for B"? (Notes: if the cost less for option A don't forget the negative sign. Input answer without "%" sign, e.g, 5.75% as 5.75.) Answer: 0.75