GPT-5.3-Codex vs GPT-5.6 Lunafor spreadsheets & Excel

Build a **time-series line chart**. Put **week ending date** (or week number in chronological order) on the **x-axis** and **total weekly revenue** on the **y-axis**.  
If possible, add a second view grouping by **month-of-year** (or week-of-year) to highlight repeating patterns.

What it will **not** tell you: whether the pattern is caused by seasonality versus other factors (promotions, stockouts, pricing changes, holidays). It shows pattern, not cause.

Build a **time-series line chart**. Put **week/date** on the x-axis and **weekly revenue** on the y-axis. This will reveal rises, dips, and possible repeating patterns over time. However, with only 14 months of data, it will **not reliably establish recurring seasonality**—there is barely more than one annual cycle to compare.