I’m pretty sure it is to read the text
The term or name for word clues in a text that appear different because they are bolded, highlighted, italicized or written in a different font is typographical, which refers to the work of setting and arranging types and of printing from them; it pertains to the character and appearance of printed material.
280 is the answer because 25% were sold on wednesday and to turn 25 into 100, you would have to multiply it by 4 which means you have to multiply 70 with four which is 280.