private async void Calculate()
{
if ((Until - Since).TotalMilliseconds < 0)
{
return;
}
ResponseModel response = await _pk.GetPayedSessionsInPeriod(_userId, Since, Until);
IEnumerable <ParkingSession> result = (IEnumerable <ParkingSession>)response.Data;
decimal?count = 0;
foreach (ParkingSession ps in result)
{
count += ps.TotalPayment;
}
CalculatedProfit = count.Value;
}
