Flint company is constructing a building. construction began on february 1 and was completed on december 31. expenditures were $1,848,000 on march 1, $1,248,000 on june 1, and $3,031,810 on december 31. flint company borrowed $1,136,530 on march 1 on a 5-year, 12% note to finance construction of the building. in addition, the company had outstanding all year a 9%, 5-year, $2,091,200 note payable and an 10%, 4-year, $3,726,200 note payable. compute the weighted-average interest rate used for interest capitalization purposes. (round answer to 2 decimal places, e. g. 7.58%.)