On Dec. 31, 2020, ABC Corp issued 4-year, 7% bonds with $3,000,000 as par value. ABC Corp. received $3,360,000 in cash. The bond interest is paid semiannually on June 30 and December 31 every year .

1)what is the total bonds premium ?

2) what the interest paid in cash semiannually?

3)what the semiannual amortization amount of the bond premium?

4) what the total bonds interest expense over the 4 years?