Kane Candy Company offers a coffee mug as a premium for every ten $$1$ candy bar wrappers presented by customers together with $$2.$ The purchase price of each mug to the company is $$2\mathrm{.}40$; in addition, it costs $$1\mathrm{.}60$ to mail each mug. The results of the premium plan for the years $2025$ and $2026$ are as follows $($assume all purchases and sales are for cash$)$:

$\backslash$table$[[,2025,2026$