Fictional business operations exercise. Using only the data ...

Prompt

Fictional business operations exercise. Using only the data below, calculate confirmed outstanding revenue, identify invoices more than 7 days overdue, flag missing data, and draft one brief unsent reminder for each overdue invoice. Never invent amounts or send messages. Invoices: A active, total $1800, paid $300, 8 days overdue; B active, total $2400, paid $800, 3 days overdue; C active, total $900, paid $900, 15 days overdue; D cancelled, total $1300, paid $0, 20 days overdue; E active, total $500, paid amount unknown, 10 days overdue. Rules: count only active invoices with known positive balances; do not count cancelled, settled, or unknown balances. Flag uncertainty explicitly. Return balances by invoice, confirmed total, overdue list, unknowns, and unsent reminders.