A time series model of sales volume has the following trend and additive seasonal variation: Trend: Y = 5,000 + 4,000 X where Y = quarterly sales volume in units, X = the quarter number (where the first quarter of 20X1 = quarter 17, the second quarter of 20X1 = quarter 18, etc) Quarter First Seasonal variation (units) +3,000 +1,000 -1,500 -2,500 Second Third Fourth What would be the time series forecast of sales units for the third quarter of 20X2? 0 97,000 O 98,500 79,500 O 95,500