This is a lot of math to write.... so I'll just say the answer is -21 :D
hello
to solve this question, we need to use know the number of possible outcomes

let's find the number of possible outcomes
we have four tiles numbered 1, 4, 5 and 8
possible outcomes are
Answer:
The amount of the markup is $90
Step-by-step explanation:
20% of 450 = 90