public async void ChangedDatesAsync() { DateStart = DateFinish.Subtract(new TimeSpan(30, 0, 0, 0)); Incomes = await repository.GetIncomeAsync(DateStart, DateFinish); Costs = await repository.GetCostsAsync(DateStart, DateFinish); AccountRepository accRepository = new AccountRepository(User); float totalActivies = await accRepository.GetTotalActiviesAsync(); Yield = Incomes / Costs; Welfare = totalActivies / Costs; }