Father & Son…

Dear Dad,

$chool i$ really great. I am making lot$ of friend$ and $tudying very hard. With all my $tuff, I $imply can’t think of anything I need, $o if you would like then you can ju$t $end me a card, a$ I would love to hear from you.

Love,
Your $on.

Dear Son,

I kNOw that astoNOmy, ecoNOmics, and oceaNOgraphy are eNOugh to keep even an hoNOr student busy. Do NOt forget that the pursuit of kNOwledge is a NOble task, and you can never study eNOugh.

Love,
Dad.

It should be noted that there are twelve ‘$‘s in the letter from the Son, yet only ten ‘NO‘s from the Dad…
Do you think that means the Son will only get $2 [or maybe $200, or $2,000]
instead of the $12 [or $1,200, or $12,000] for which he was originally asking?