public void CanCalculateTax()
{
int first = new TakeHomeCalculator(TaxRate.Of(10)).NetAmount(Money.Create(40, "GBP"),
Money.Create(50, "GBP"),
Money.Create(60, "GBP")).value;
Assert.Equal(135, first);
}
public void CannotSumDifferentCurrencies()
{
Assert.Throws <Incalculable>(() => new TakeHomeCalculator(TaxRate.Of(10)).NetAmount(
Money.Create(4, "GBP"), Money.Create(5, "USD")));
}
