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Leslie Sporting Goods is a locally owned store that specializes in printing team jerseys. The majority of its business comes from orders for various local teams and organizations. While Leslie$$s prints everything from bowling team jerseys to fraternity$/$sorority apparel to special event shirts, summer league baseball and softball team jerseys are the company$$s biggest source of revenue.

A portion of Leslie$$s operating information for the company$$s last year follows:

Number of Operating

Month Jerseys Printed Cost

January $175$ $$4,825$

February $2005,865$

March $1905,670$

April $5658,600$

May $6509,225$

June $6759,800$

July $4156,260$

August $3106,015$

September $3356,150$

October $2405,980$

November $2355,945$

December $1804,940$

Required:

$3.$ Using the high$-$low method, calculate the store$$s total fixed operating costs and variable operating cost per jersey.

$4.$ Using the high$-$low method results, calculate the store$$s expected operating cost if it printed $450$ jerseys.

$5.$ Perform a least$-$squares regression analysis on Leslie$$s data.

$6.$ Using the regression output, create a linear equation $($y $=$ a $+$ bx$)$ for estimating Leslie$$s operating costs.

$7.$ Using the least$-$squares regression results, calculate the store$$s expected operating cost if it prints $645$ jerseys.

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