CREATE TABLE table_name_18 (sales__billion_ INTEGER, market_value__billion_$_ VARCHAR(255), profits__billion_$_ VARCHAR(255))
What is the average sales for the company with market value of 204.9bil and profits under 20.6bil?
    
SQL: SELECT AVG(sales__billion_) AS $_ FROM table_name_18 WHERE market_value__billion_$_ = 204.9 AND profits__billion_$_ < 20.6