Problem $3-12$

The following equation summarizes the trend portion of quarterly sales of condominiums over a long cycle. Sales also exhibit seasonal variations.

Ft $=655\mathrm{.}5$t $+4\mathrm{.}5$t $2$

where

Ft $=$ Unit sales

t $=0$ at the first quarter of last year

Quarter Relative

$1\mathrm{.}95$

$2\mathrm{.}90$

$3\mathrm{.}45$

$41\mathrm{.}70$

Using the information given, prepare a forecast of sales for each quarter of next year $($not this year$),$ and the first quarter of the year following that. $($Round intermediate calculations and final answers to $2$ decimal places.$)$

Quarter Forecast

$1$

$2$

$3$

$4$

$1$