Table: rgc_1987
Columns: place
nation
all_around
final
total

Question: What is the sum of the all around with a 37.75 total?
SQL: SELECT SUM("all_around") FROM rgc_1987 WHERE "total" = 37.75

Question: What is the average final with an all around larger than 19.4 and total more than 39.9?
SQL: SELECT AVG("final") FROM rgc_1987 WHERE "all_around" > 19.4 AND "total" > 39.9