We use How much ... ? to ask about prices.
How much is (that)/(the concert)?
It’s ten dollars.
How much are (the tickets)/(these books)?
They’re six pounds fifty.
£20 = twenty pounds
£7.50 = seven pounds fifty
40p = forty p /p:/
£29.99 = twenty-nine ninety-nine
€9 = nine euros
€6.50 = six euros fifty
$35 = thirty-five dollars
50c = fifty cents
