Problem $3-11($Algo$)$

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 following equation to estimate the trend component of monthly demand: Ft $=50+4$t$,$ where t $=0$ in June of last year. Seasonal relatives are $1\mathrm{.}11$ for January, $\mathrm{.}91$ for February, and $\mathrm{.}89$ for March. What demands should she predict?

Note: Round your answers to $2$ decimal places.