WT Microelectronics (TWSE : 3036) today announced its monthly sales for April 2015 totaled NT$10.007 billion, a decrease of 1.55% from March 2015 and an increase of 14.14% over April 2014. Sales for January through April 2015 totaled 38.545 billion, an increase of 21.31% compared to the same period in 2014.