Build me an interactive revenue planning calculator from the attached P&L export. It's for annual planning, so leadership can align on top-line goals. Publish it as an artifact I can reopen and share. 1. Read the file first. Find the monthly P&L (accounts down the rows, months across the columns), the last month of actuals, and every revenue account. Before building, ask me only: - Which months the plan should cover (default: the month after the last actual through December of next year)