PLEASE HELP ME FILL OUT THE EXCEL SHEET WITH THE INFO GIVEN

Tires for You, Inc. $($TFY$),$ founded in $1987,$ is an automotive repair shop specializing in replacement tires.

Located in Altoona, Pennsylvania, TFY has grown successfully over the past few years because of the

addition of a new general manager, lan Overbaugh. Since tire replacement is a major portion of TFY$\text{'}$s

business $($it also performs oil changes, small mechanical repairs, etc.$),$ lan was surprised at the lack of

forecasts for tire consumption for the company. His senior mechanic, Skip Grenoble, told him that they

usually stocked for this year what they sold last year. He readily admitted that several times throughout the

season stockouts occurred and customers had to go elsewhere for tires.

Although many tire replacements were for defective or destroyed tires, most tires were installed on cars

whose original tires had worn out. Most often, four tires were installed at the same time. lan was

determined to get a better idea of how many tires to hold in stock during the various months of the year.

Listed below is a summary of individual tire sales by month:

PERIOD

January $9,724$ February $8,786$ March $9,254$ April $10,691$ May $9,256$ June $8,700$ July $10,192$ August $10,751$ September $9,724$ October $10,193$ November $11,599$

Ian has hired you to determine the best technique for forecasting TFY demand based on the given data.

CASE QUESTIONS

Calculate a forecast using a simple three$-$month moving average.

Calculate a forecast using a three$-$period weighted moving average. Use weights of $0\mathrm{.}60,0\mathrm{.}30,$ and

$0\mathrm{.}10$ for the most recent period, the second most recent period, and the third most recent period,

respectively.

Calculate a forecast using the exponential smoothing method. Assume the forecast for period $1$ is

$9,500.$ Use alpha $=0\mathrm{.}40.$

Once you have calculated the forecasts based on the above data, determine the error terms by

comparing them to the actual sales for $2012$ given below:

PERIOD

TIRES USED

$2012$

January

$10,696$

February $9,665$ March $10,179$ April $11,760$ May $9,150$ June $9,571$ July $8,375$ August $11,826$ September $10,696$ October $11,212$ November $9,750$ December $9,380$