If you can provide me with the table, where it gives you all your information for this question, I can edit this and show you how to do it. (with answer). It's hard to answer something where you don't know what you need to answer.
Answer:
3y+ty
Step-by-step explanation:
you do y x 3= 3y
then you do t x y= ty
$123.53 because divide 132.44 by 16 and subtract .31 is the tax. Subtract that number from 131.44 is the cost of the desk before tax