Direct or indirect income

Hi, My Query is regarding income from business. We are running a textile manufacturing industry.

After manufacturing the finished goods, we deliver this goods to our customers with the invoice, which also includes an additional Transportation Charges except the price of the goods and also sometimes Insurance charges if the customer is an overseas customer.

The price of the goods goes to sales account directly which is my direct income; but I want to know what kind of income is Transport charges and Insurance charges which we collect from our customers. Is it direct income or indirect income.????

Suggestions needed.

Thanks in advance.

Ajay