Happy Dog Soap is considering an investment that will have the following sales, variable costs, and fixed operating costs:

$\backslash$table$[[,$Year $1,$Year $2,$Year $3,$Year $4],[$Sales $($units$),4,800,5,100,5,000,5,120],[$Sales price,$$22\mathrm{.}33,$$$23\mathrm{.}45,$$$23\mathrm{.}85,$$$24\mathrm{.}45$