PepsiCo uses potatoes for most of its products. The CEO has requested that you outline the forecasted volumes in tonnes using trend projection for the first FIVE months of $2025($January$,$ February, March, April, May and June$)$ using the data for $2024$ provided. The following data for $2024$ is provided for potatoes in tonnes.

Month $-$ Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Sales $-515554575068665967697577.$ Provide the relevant calculations.