My code fails the 4 case

Question

Kaleidoscopes

You sell souvenir kaleidoscopes at a gift shop, and if a customer buys more than one, they get a 10% discount on all of them!
Given the total number of kaleidoscopes that a customer buys, let them know what their total will be. Tax is 7%. All of your kaleidoscopes cost the same amount, 5.00.

Task:
Take the number of kaleidoscopes that a customer buys and output their total cost including tax and any discounts.

Input Format:
An integer value that represents the number of kaleidoscopes that a customer orders.

Output Format:
A number that represents the total purchase price to two decimal places.

Sample Input:
4

Sample Output:
19.26
https://code.sololearn.com/c01ggA3z1SzB/?ref=app

Answer 1

No need use ceil funtion, too tedious multiplier, 0.9 1.07 can do far better.

Answer 2

For such as payment calculations will be used round.