Evaluate the Sum $$\sum _ { i = 3 } ^ { 6 } ( 3 i - 4 )$$

Evaluate the sum. Round to two decimal places, if necessary.
- $$\sum _ { i = 3 } ^ { 6 } ( 3 i - 4 )$$

A) 38
B) 42
C) 23
D) 33