Skylar needs to buy a pair of dress pants for $40 a shirt for $30 dollars and a tie for $20

That will be 90 dollars because if you do 4+2=7 and then add the 0 so you will get 70 then plus 20 you do 7+2=9 so then you will get 9 so add the 0 and you get 90 dollars. So you will have to earn 90 dollars

Altogether that's $120 dollars so that's how much u need