Returning Complex Values-- I wrote exactly the same code which in the video, but there are three errors. Why?

func carpetCostCalculator(length length: Int, width: Int, carpetColor: String = "tan") -> (price: Int, carpetColor: String) {
    // Gray Carpet - 1$/sq ft
    // Tan Carpet - 2$/sq ft
    // Deep Blue Carpet - 4$/sq ft

    let area = calcalateArea(length, width: width)

    var price: Int

    switch carpetColor {
    case "gray":
        price = area * 1
    case "tan":
        price = area * 2
    case "blue":
        price = area * 4
    default:
        price = 0
    }
    return (price, carpetColor)    
}

let result = carpetCostCalculator(length: 10, width: 20)   [Error:Ambiguous use of 'carpetCostCalculator(length:width:carpetColor:)'

result.price   [Error:Value of type 'Int' has no member 'price']
result.carpetColor   [Error:Value of type 'Int' has no member 'carpetColor']