Table: italian_grand_prix_1965
Columns: driver
constructor
laps
time_retired
grid

Question: What is the sum of grids with an engine in Time/Retired with less than 45 laps for Giancarlo Baghetti?
SQL: SELECT SUM("grid") FROM italian_grand_prix_1965 WHERE "time_retired" = 'engine' AND "laps" < 45 AND "driver" = 'giancarlo baghetti'