/**
  * Calculate rent amount after adding deposit payments to the amount that
  * was arrived at after subtracting expenses
  * @param int $prop_id ID used to identify the property
  * @param string $start Date string specifying start of the period
  * @param string $end Date string specifying end of the period
  * @return int $amount_plus_deposit_payments
  */
 public function calcAmountPlusDepositPayments($prop_id, $start, $end)
 {
     $bal_after_expenses = $this->calcAmoutLessExpenses($prop_id, $start, $end);
     $bal_after_expenses = (int) $this->_sanitizeMoneyString($bal_after_expenses);
     $deposit_payments = Deposit::calcPaymentsForPeriodByProperty($prop_id, $start, $end);
     $deposit_payments = (int) $this->_sanitizeMoneyString($deposit_payments);
     $new_balance = $bal_after_expenses + $deposit_payments;
     return number_format($new_balance, 2);
 }