At a fair market price, how much money there'll be?

"Six shillings a pair—five—four—three-and-six,

To prevent all mistakes, that low price I will fix;

Now what will that make? fifty chickens, I said,

Fifty times three-and-sixpence—I'll ask brother Ned.

"Oh! but stop—three-and-sixpence a pair I must sell 'em;

Well, a pair is a couple—now then let us tell 'em;

A couple in fifty will go—(my poor brain!)

Why just a score times, and five pair will remain.

"Twenty-five pair of fowls—now how shameful it is,