Calculate Your Slugging Average

Number of Singles:
Number of Doubles:
Number of Triples:
Number of Home Runs:
Official at bats:    (Plate appearances - walks - hit by pitch - sacrifices)
Your Slugging Average is:    (Total bases/Official at bats)
Note: Total bases = singles + (2 * doubles) + (3 * triples) + (4 * home runs)