[Grammar] Regarding diffrence and usage of model verbs shall and will.

[Joe333]

Sentence: " Apology I could not reply you yesterday, electricity had gone. As per your wish I shall/will reply to you through mail."

My question: Which modal verb "will" or "shall" would be appropriate grammatically in the sentence ? And what is the diffrence between these two modal verbs "shall" and "will" ? Please tell with indigenous examples.



Thanks and regards

 

[Joe333]

Thanks for your reply sir.