Please help find and solve the Forecast for months May-Dec for Regular, Midgrade, and Premium oil

FROM: Vivienne Batel/Owner SUBJECT: Market Research Gas sales across type of gasoline: 80% of gas sales tend to be regular, 15% tend to be midgrade, and 5% tend to be premium. Effect of price on demand: Every $0.10 increase in the price per gallon of gas tends to decrease gallons of gas sold by 1% to 3%. Monthly Seasonal Factors: Chart representing the monthly seasonality factor for gasoline (a factor of 1.00 represents the baseline monthly demand). Table : Seasonal factors for monthly demand JAN 0.87 FEB 005 MAR 1.00 APR 1.05 MAY 1.08 JUN 115 JUL AUG 1.07 SEP OCT 0 94 NOV DEC 085