Answer and Explanation:
a. Since Note is 60 days due Â
Due date  Â
Jul   19 days
Aug 31 days
Sep 10. 10 days Â
Total  60 days Â
Hence, the Due date is Sep 10 Â Â
b Here we assume 365 days in a year Â
Now
Interets on Note = $28,000 × 6% × 60 ÷ 365 Â
= $276.16 Â
And, finally Maturity value is
= $28,000 + $276.16
= $28,276.16
c. Â The journal entry is
Sep 10. Cash $28,276.16 Â
     To  Note Receivable  $28,000.00
     To Interest Revenue  $276.16
(Being the cash received is recorded)