Teton Village Contains Shops, Restaurants and Motels

Teton Village contains shops, restaurants and motels. They have two peak seasons - winter for
Skiing, and summer for tourists visiting nearby parks. The specific seasonal with respect to the total
Sales volume for recent years are:
Using the seasonal indexes below, explain the typical index for the spring season.

A) Total sales for the spring season are typically 18.3% below the annual average.
B) Total sales for the spring season are typically 18.3% above the annual average.
C) Total sales for the spring season are typically 81.7% below the annual average.
D) Total sales for the spring season are typically 81.5% below the annual average.