Table schema:
CREATE TABLE table_name_68 (laps INTEGER, time_retired VARCHAR, grid VARCHAR, constructor VARCHAR)

Question: How many laps with a grid larger than 7 did a Lotus - Ford do with a Time/Retired of + 2 laps?
SQL: SELECT SUM(laps) FROM table_name_68 WHERE grid > 7 AND constructor = "lotus - ford" AND time_retired = "+ 2 laps"