carmen's Beauty Salon has estimated monthly financing requirements for the next six months as follows:
January $10,500. April $10,500
February $4,500. May $11,500
March. $5,500. June $6,500
short term financing will be utilized for the next six months. projected annual interest rate are:

January 9% April 16%
February 10% May 12%
March 13% June 12%
what long term interest rate would represent a break even point using short term financing and long term financing?