please show all work so I understand the material, I dont know how to get interest amount without the rate....

21. Your monthly payments are due on the 8th of each month, starting October 8. The lender receives your first monthly payment ($247.61) on October 6. For your second monthly payment, you pay $300; the lender receives the payment on November 10. Calculate interest, principal, and remaining balance for each payment using the U.S. Rule. Total Payment Interest Principal Due Date Sep. 8 Oct. 8 Nov. 8 Date Received (Start) Oct. 6 Nov. 10 Balance $8,200.00 $247.61 $300.00 21. Your monthly payments are due on the 8th of each month, starting October 8. The lender receives your first monthly payment ($247.61) on October 6. For your second monthly payment, you pay $300; the lender receives the payment on November 10. Calculate interest, principal, and remaining balance for each payment using the U.S. Rule. Total Payment Interest Principal Due Date Sep. 8 Oct. 8 Nov. 8 Date Received (Start) Oct. 6 Nov. 10 Balance $8,200.00 $247.61 $300.00