func convert(_ textValue: String) -> Int{

        var total = 0
        var valueMap = [
            "1" as Character: 1,
            "2": 2,
            "3": 3,
            "4": 4,
            "5": 5,
            "6": 6,
            "7": 7,
            "8": 8,
            "9": 9,
            "0": 0
        ]
        for (i, c) in textValue.enumerated() {
            let exponent = textValue.count - i - 1
            if let value = valueMap[c] {
                let num = Decimal(value) * pow(10, exponent)
                total += NSDecimalNumber(decimal: num).intValue
            }
        }
        return total
    }