A manager of a store that sells and installs spas wants to prepare a forecast for January, February. and March of next year. Her forecasts are a combination of trend and seasonality. She uses the fol lowing equation to estimate the trend component of monthly demand: F$,=70+5$t$,$ where $1=0$ in June of last year. Seasonal relatives are $1\mathrm{.}10$ for January, $1\mathrm{.}02$ for February, and $\mathrm{.}95$ for March

Using the combination of trend and seasonality, what is the forecast demand of January of next year?