user: Question: Name the total number of frequency Mhz for when it has ERP W of 1 and call sign of w215bj
Columns: ['Call sign', 'Frequency MHz', 'City of license', 'ERP W', 'FCC info']
Types: ['text', 'real', 'text', 'real', 'text']
Sample row: ['W211BF', 90.1, 'Big Stone Gap, Virginia', 8.0, 'FCC']
SQL:

assistant: SELECT SUM("Frequency MHz") FROM "Table" WHERE "ERP W" = 1.0 AND "Call sign" = 'w215bj';