Answer: amount necessary to pay the invoice in full is $ 1231.68

Working notes for the above answer is as under

We have been provided that ,

Cody’s Book Nook received an invoice dated July 27 for $1283 with terms of 4/5 EOM

Using “4/5 EOM” (the invoice is due and payable 5 days after the end of the month in which the sale occurred).

Here bill is paid within the discount date so cloudy is able to get discount

She wil get 4% discount as follow