58.50 - 45 = 13.50
13.50 / 45 x 100 = 30%
answer: mark up 30%
10% means for every 100 she spend 10
in 800 there are 8 100 thus she speds 80
or 10% to decimal form is

If it is 40% off, it means you have to pay 60% of its price.
$67 × 60/100 = $40.20
the 8% of sales tax is added from the $40.20
$40.20 × 8/100 = $3.22
total price = $40.20 + $3.22 = $43.42
Answer:
378
Step-by-step explanation:
9 × 7 × 6 = 378
pls mark brainliest, if not, its ok :)