CNBC reported that one in five consumers who purchase bitcoin do so using their credit card. Melissa Gamez purchased a used RV with 19,100 miles for $47,000. Originally the RV sold for $70,500 with a residual value of $20,100. After subtracting the residual value, depreciation allowance per mile was $0.87. How much was Melissa's purchase price over or below the book value? (Input the amount as positive value.) Purchase price was the book value by Does she have any equity that might assist her with purchasing bitcoin? Yes