public decimal CalculateInterest(IAccount account)
{
var amount = account.SumTransactions();
if (amount <= 0)
return 0;
return amount * 0.001m;
}
public decimal CalculateInterest(IAccount account)
{
var amount = account.SumTransactions();
if (amount <= 0)
return 0;
if (amount <= 1000)
return amount * 0.001m;
else
return 1 + (amount - 1000) * 0.002m;
}
public decimal CalculateInterest(IAccount account)
{
var amount = account.SumTransactions();
if (amount <= 0)
return 0;
DateTime tenDaysPrior = DateTime.Now.AddDays(-10);
bool hasWithdrawalsInTenDaysPrior = account.Transactions.Any(t =>
t.transactionType == Model.TransactionTypes.Withdrawal
&& t.transactionDate >= tenDaysPrior);
if (hasWithdrawalsInTenDaysPrior)
return amount * 0.001m;
return amount * 0.05m;
}