An Electric Company estimates its demand trend line (in millions of kilowatt hours) to be D = 79 + 0.52 Q, where Q refers to the sequential quarter number and Q=1 for winter 2000. In addition, the multiplicative seasonal factors are as follows:
Quarter Index
Winter 0.8
Spring 2.2
Summer 2.1
Fall 0.7
Forecast energy use for Spring of 2,008. Specify as a whole number by rounding.