How much does it cost to get Vietnam visa on arrival totally?

In general, there are two kinds of fee you are required to pay:
Service fee: must be paid in advance for your process of visa approval letter that officially issued by Vietnam Immigration Department. The fee amount is determined by:
-   The number of entries. (single/multiple)
-   The length of stay (1 month/3 months)
-   The processing time (normal/urgent/super urgent)
Stamping fee: the fee you are required to pay for Vietnam Immigration Officers at arrival airport to get official visa stamped onto your passport. It is USD 45 for 1 month single entry and USD 65 for 1  month multiple and USD 95 for 3 month multiple one. The stamping fee must be IN CASH, credit cards are not accepted.