a company issues 1 0 0 0 0 0 0 0 7 % 2 0 year bonds to yield 8 % on jan 1 , year 1 . interest is paid on june 3 0 and dec 3 1 . the proceeds from the bonds are 9 0 1 0 3 6 1 . what is interst expense for year 1 using the effective interest method