question: What is the total number of First elected that has a country represented in Baltimore county, a district of 06.0 6, and a committee of economic matters?
answer: SELECT COUNT(first_elected) FROM table_name_80 WHERE counties_represented = "baltimore county" AND district = "06.0 6" AND committee = "economic matters"
context: CREATE TABLE table_name_80 (first_elected VARCHAR, committee VARCHAR, counties_represented VARCHAR, district VARCHAR)