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# Stuck on Struct methods challenge task 3 of 4

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.

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

init (description: String, amount: Double, item: String) {
self.description = description
self.item = Expense.description("car")
self.amount = 100.0

}

// 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, you might want to create a `variable` and then create an instance of your `struct` and assign it to that variable, it is very easy to do:

```var item = Expense(description: "Item description", amount: 10)
```

Make sure that you instantiate your `struct` outside of `struct` declaration, like shown below:

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

init (description: String, amount: Double) {
self.description = description
self.amount = 100.0
}

// 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: "Item description", amount: 10)
```