$[$Note: please display your answers to two decimal places but carry the full values in the

calculations $-$ i$.$e$.,$ do not round the numbers while you are performing your calculations.$]$

Toyota Motors observes from the sales data that sales of Hybrid $G$ has been decreasing over the last

year. The firm wants to incorporate this decreasing trend into its forecasts. The following table

contains the firm's sales data from month $1$ to month $6.$

Using double exponential smoothing method to forecast sales for months $2$ to $7,$ assuming A$1=$

$1443$ and $T1=-30$ and set $=0\mathrm{.}9$ and $=0\mathrm{.}4.$

The forecast sales for month $2(F_2)$ is

The forecast sales for month $3(F_3)$ is

The forecast sales for month $4(F_4)$ is

The forecast sales for month $5(F_5)$ is

The forecast sales for month $6(F_6)$ is

The forecast sales for month $7(F_7)$ is