Rio Bus Tours has incurred the following bus maintenance costs during the recent tourist season. $[$The real is Brazil's national monetary unit. On the day this exercise was written, the real was equivalent in value to $0\mathrm{.}2545$ U$.$S$.$ dollar.$]$

$\backslash$table$[[$Month$,\backslash$table$[[$Miles Traveled$],[$by Tour Buses$]],$Cost,$],[$November$,8,500,11,400,$real$],[$December$,10,600,11,600,],[$January$,12,700,11,700,],[$February$,15,000,12,000,],[$March$,20,000,12,500,],[$April$,8,000,11,000,],[,,,]]$

EX $6-30($Static$)$ Part $1$: Rio Bus Tours has incurred the following bus maintenance costs...

Required:

Use the high$-$low method to estimate the variable cost per tour mile traveled and the fixed cost per month.

Develop a formula to express the cost behavior exhibited by the company's maintenance cost.

Predict the level of maintenance cost that would be incurred during a month when $22,000$ tour miles are driven.

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Use the high$-$low method to estimate the variable cost per tour mile traveled and the fixed cost per month.