Headland Company is constructing a building Construction began on February 1 and was completed on December 31 . Expenditures were $2,076,000 on March 1,$1,224,000 on June 1 and $3,076,600 on December 31. Headland Company borrowed $1,155,090 on March 1 on a 5-year, 12% note to help finance construction of the building. In addition, the company had outstanding all year a 9%,5-year, $2,376,900 note payable and an 10%,4-year, $3,397,000 note payable. Compute the weighted-average interest rate used for interest capitalization purposes. (Round answer to 2 decimal places, es. 7.58%.)