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# Going around in circles

Ok I have no idea where to go from here. Don't think I understand the question, every which way I experiment to get this done I'm getting it wrong

struct.swift
```struct Expense {
var description: String
var amount: Double = 0.0

init (description: String) {
self.description = description
}

// add the calculateTaxes method here
// it should accept only one parameter named 'percentage' of type Double
func calculateTaxes(percentage: Double) -> Double {
return self.amount * (percentage/100)

init(Expense) -> Double {
var item = amount: 100

}

}

}
```

Can you post the questions please do we could look at what's the problem

Hi Stepan!

Thanks for getting back to me so quick! Ok so part 3 of the challenge asks this:

"Create a variable named item and assign it an instance of Expense (remember to use the initializer with the description parameter. Enter any description you like). On the next line assign the amount property a value of 100."

```var taxes = item.calculateTaxes(7.5)
```

Stepan, you my friend are a life saver. I was trying all sorts of complex work arounds and the answer was so simple!

Thanks buddy :)

Hi, try this:

```struct Expense {
var description: String
var amount: Double = 0.0

init (description: String) {
self.description = description
}

// add the calculateTaxes method here
// it should accept only one parameter named 'percentage' of type Double
func calculateTaxes(percentage: Double) -> Double {
return self.amount * (percentage/100)
}
}
```

Hi Stepan,

I've already done this part of the challenge its steps 3 and 4 that I'm getting stuck on

Ok try this then:

```struct Expense {
var description: String
var amount: Double = 0.0

init (description: String) {
self.description = description
}

// add the calculateTaxes method here
// it should accept only one parameter named 'percentage' of type Double
func calculateTaxes(percentage: Double) -> Double {
return self.amount * (percentage/100)
}
}

var item = Expense(description: "My description")
item.amount = 100
```

Hi Stepan, that helps loads, do you think you could help me with the 4th piece of the challenge before I jump off a roof? This is what its asking me:

"We need to figure out the tax amount when the tax percentage is 7.5 percent. Call the method calculateTaxes on the variable item and assign the result to a new variable named taxes."