CREATE TABLE table_36928 ("Name" TEXT, "GP-GS" TEXT, "Effic" FLOAT, "Cmp-Att-Int" TEXT, "Avg/G" FLOAT)

Which Avg/G that has a Name of opponents, and an Effic smaller than 129.73?
SELECT SUM("Avg/G") FROM table_36928 WHERE "Name" = 'opponents' AND "Effic" < '129.73'
SELECT SUM("Avg/G") FROM "table_36928" WHERE "Effic" < '129.73' AND "Name" = 'opponents'