public void StatisticsTest()
{
//arrange
var budget = new Budget("");
budget.AddTransaction(48.5);
budget.AddTransaction(136.49);
budget.AddTransaction(300);
//act
var result = budget.GetStatistics();
//assert
Assert.Equal(161.66, result.AverageTransaction, 2);
Assert.Equal(300, result.HighestTransaction);
Assert.Equal(48.5, result.LowestTransaction);
}