Happy news from the Ministry of Finance. Since 23rd November 2015, the visa stamping fee will be cut down to boost the Vietnamese tourism industry. In details, the single visa fee will drop from $45 to $25 and the multiple visas valid for 3 months will be $50 instead of the current $95.
http://www.vietnamvisa-easy.com/vietnam-visa-information/vietnam-visa-fee-decrease-from-23rd-november
Fiona