Anuj NagarData analysis & science writing

Experiment 04

Coca-Cola US Sales in Excel

Selling more units is not enough. The goal is to sell the right products, in the right regions, through the right retailers, at a healthy margin. This workbook finds where that is and isn’t happening.

Period
Built Oct 2026; data covers 2021
Stack
Microsoft Excel: SUMIFS, conditional formatting, data validation
Data
3,888 invoice lines, 4 retailers, 50 states
Context
Crio.Do DA-201, session 4
Question

How can sales and profitability improve across US retailers?

  1. Where: how do sales vary by retailer, region, state and brand?
  2. When: is there a seasonal pattern in sales and margin?
  3. How well: where are margins strong, and where are they weak?

The data: 3,888 invoice lines from 1 January to 31 December 2021, covering 4 retailers, 5 regions, 50 states and 6 brands.

Method

Everything live in Excel, margins weighted

  • Prepare. No missing values or duplicates; real dates and numbers; header frozen, filters on; a Month helper column. The original file stays untouched.
  • Aggregate. SUMIFS for every retailer, region, brand, month and state total.
  • Weight the margins. Operating profit divided by sales, never a simple average of row-level percentages, so big orders count in proportion.
  • Show. A dashboard with KPI tiles and 7 charts, colour-scale heatmaps (region × brand), and an Explorer sheet with dropdowns for retailer, region and brand.
Result

Volume and profit point in different directions

  • $8.68Mtotal sales
  • $3.17Moperating profit
  • 36.5%weighted margin
  • 17.15Munits sold
Retailers: FizzySip is the second-largest account but has the thinnest margin. BevCo is small but the most profitable.

The same pattern shows by region: the West brings in about a third of sales at the lowest margin (32.6%), while the South is smaller but the most profitable (42.0%). Among brands, Coca-Cola leads at 39.3% and Diet Coke trails at 33.4%.

Demand is seasonal, and the margin barely moves, so the swings come from volume, not profitability:

Monthly sales, 2021. Peaks in July (summer) and December (holidays); margin stays between 35.8% and 37.0% all year.

What I would recommend: renegotiate terms with FizzySip and in the West, grow BevCo and the South, time promotions around July and December, and review Diet Coke and Sprite pricing or costs.

Caveat

Three oddities I left in, and flagged

  • Zero-sale rows. Units sold has a minimum of 0, so a few rows record no sales.
  • Wyoming and Utah are identical, down to the cent: $199,937.50 in sales and $69,359.38 in profit.
  • South region = BevCo. The two contain exactly the same rows.

I kept them as supplied so the totals tie back to the source, and recommended verifying them with the data owner before acting on any of the findings.

Contact

Got a messy dataset or a science question?

I read everything and answer when I can. The quickest way is email, and LinkedIn works too.