Recognizing the interrogative tools, how to use them, how to respond to them, and the formation of the sentence (what?)

Box of 20 (Who?)
$3,10

Box 22 (When?)
$3,25 Original price was: $3,25.$2,75Current price is: $2,75.
Box 21 (what?)
$3,25 Original price was: $3,25.$2,75Current price is: $2,75.
Recognizing the interrogative tools, how to use them, how to respond to them, and the formation of the sentence (what?)
Category: Smart speech group