Instruct: What is the total prominence in m of kangchenjunga west (yalung kang) peak, which has a height in m greater than 7,903 and a height in ft less than 27,904?
Output: SELECT COUNT Prominence (m) FROM table WHERE Height (m) > 7,903 AND Name of peak = kangchenjunga west (yalung kang) AND Height (ft) < 27,904