Remember 'lira' reflects present-day currency only in Turkey, so don't confuse it with past currencies. The price tag said 20 lira, which I knew was the Turkish currency.
Pro Tip 2/3
Plural Form
In English, 'lira' and 'liras' both work as plural, but 'lira' is more common referring to Turkish money. She exchanged 100 dollars for 750 lira.
Pro Tip 3/3
Not Interchangeable
'Lira' is specific to Turkey; don't use it for other currencies like 'Pound' or 'Euro'. When in Istanbul, you'll need to use lira, not euros, for purchases.