How to compute the price of bonds on their issue date

Here are a couple of other threads where I have explained this. If you need further clarification, please be specific as to what you don't understand.

https://www.askmehelpdesk.com/finance-accounting/computing-bond-price-199941.html
https://www.askmehelpdesk.com/finance/how-do-you-compute-current-price-bonds-200150.html