I had question regarding treasury stock. under the par value method.

on Jan 1st, 20x1 If a company issues 2000 shares at $10 (at $1 par value)
and then issues 300 more shares at $15 ($3 par value)

when i do the journal entries for the corporation repurchasing the stock, is the par value based upon the original 2000 shares or the issue of 300 shares?

any help would be appreciated. thanks

The par value won't change, only the market value (therefore, APIC). There isn't a situation where a company would issue $1 par C/S, then another round of $3 par C/S. Par will always be par.