T-shirt sales: forecast adjustments

After all that work, you were able to get a quality forecast. Your manager is excited about these new insights and wants to present them to the board. Before doing that, he asked for some final tweaks. The forecast should predict sales up until Q1 2022 and the tooltip should display the 90% prediction interval values.

If you lost progress, load the workbook 4_3_final.twbx from the Workbooks folder on the Desktop.