Johnson Enterprises uses a computer to handle its sales invoices. Lately, business has been so good that it takes an extra $3$ hours per $.$night, plus every third Saturday, to keep up with the volume of sales invoices. Management is considering updating its computer with a faster model that would eliminate all of the overtime processing.

$\backslash$table$[[,\backslash$table$[[$Current$],[$Machine$]],\backslash$table$[[$New$],[$Machine$]]],[$Original purchase cost,$$15,000,$$$25,000$