January	February	March	April	May	June
0.90	0.87	0.95	0.93	1.00	1.04
July	August	September	October	November	December
1.05	1.10	1.12	1.02	1.03	0.99

1. Interpret the seasonal index for September. (2 marks)
2. From the original historical data (1999 - 2003) a trend line of TR_t = $5.50 + $0.23t, where t = 1 to 60, was calculated. Assuming a multiplicative seasonal model forecast the cost of a bushel of grapefruits for each of the first six months of 2004. (6 marks)