Answer:
The markup price of the item is 1560 cents and the selling price of the skateboard is 5460 cents .
Explanation:
As given
A skateboard costing $39.00 marked up 40% on cost.
40% is written in the decimal form .

= 0.40
Markup price = 0.40 × Cost of the skateboard
= 0.40 × 39
= $15.6
As
1 dollar = 100 cents
Now convert 15.6 dollars into cents .
$15.6 = 15.6 × 100 cents
= 1560 cents
Thus markup price is 1560 cents .
Selling price of the items = Original cost of the skateboard + Markup price
= $39 + $15.6
= $ 54.6
As
1 dollar = 100 cents
Now convert 54.6 dollars into cents .
$54.6 = 54.6 × 100 cents
= 5460 cents
Thus selling price of the skateboard is 5460 cents .
Therefore the markup price of the item is 1560 cents and the selling price of the skateboard is 5460 cents .