Kaleidoscope problem(with python)

Question

1.customer orders the kaleidoscope(5.00 per one).
2.if the customer buys more than one, they get a 10% discount on every product.
3. tax 7% needs to be applied.
4. The discount comes first, and then taxes

a = float(input())
#used float to calculate float

if a > 1:
a -= a*0.1 #discount
ord_num += ord_num*0.07 #tax

print("%.2f"%(ord_num*5))#iamidiot

this is on the codecoach as an “easy” level
this code can get past test 4, but fails at 5. why?

Answer 1

Tae Jun Kim ,

> the logic of the code is difficult to read and to understand. it also can not pass the test cases.

var `a` takes an input from user which is the *number of items*. later on in the `if conditional` it is discounted. we have to discount the calculated price, but not the number of items.

try to follow this:

> take an integer number as input.

> if number of items is 1:
> apply the tax to the item price like: 5 * 1.07
> if number of items is greater than 1:
> multiply the number of items by 5, and apply the discount and tax like: number_of_items * 5 * 0.9 * 1.07

> output the result to 2 decimal places.

Answer 2

'a' is number of orders so it is number type input not float type

amount would be a * 5.0

#calculate amount
amount = a * 5.0

if a > 1:
#subtract discount
amount = amount - amount * 0.1

# add tax
amount = amount + 0.07 * amount

Answer 3

Ok. Thank you for your help

Answer 4

thank you. Both explains great. I solved the problem.