Crispo - Excel Challenge 39 2025

excel-challenges
weekly-exercises
Easy Sunday Excel Challenge
Published

September 28, 2025

Illustration for Crispo - Excel Challenge 39 2025

Challenge Description

Easy Sunday Excel Challenge

⭐ Problem Adjusted Price and Unit Values Item Prices Units Values

Solutions

library(tidyverse)
library(readxl)

path = "files/2025-09-28/Challenge 67.xlsx"
input = read_excel(path, range = "B2:E8")
test  = read_excel(path, range = "G2:J7")

result = input %>%
  mutate(Prices = Prices + first(Prices),
         Values = `Unit Values` + first(`Unit Values`)) %>%
  filter(row_number() != 1) %>%
  select(-`Unit Values`) 

all.equal(result, test)
# [1] TRUE

  • Logic:

    • Reads the workbook range needed for the challenge

    • Builds the intermediate helper columns that drive the final answer

  • Strengths:

    • The R solution stays compact and mirrors the workbook logic closely.

  • Areas for Improvement:

    • The code assumes the workbook layout and named ranges remain stable.

  • Gem:

    • The best part of the solution is choosing a tidy intermediate shape before producing the final answer.
import pandas as pd

path = "files/2025-09-28/Challenge 67.xlsx"
input = pd.read_excel(path, usecols="B:E", skiprows=1, nrows=7)
test = pd.read_excel(path, usecols="G:J", skiprows=1, nrows=5).rename(columns=lambda c: c.replace('.1', ''))

numeric_cols = input.select_dtypes(include='number').columns
for col in numeric_cols:
    input[col] = input[col] + input[col].iloc[0]
result = input.iloc[1:].reset_index(drop=True)

result.columns = test.columns
print(result.equals(test)) # True

  • Logic:

    • Reads the workbook range needed for the challenge

    • Applies the rule iteratively until the output is complete

  • Strengths:

    • The Python version keeps the same rule in a direct pandas-oriented workflow.

  • Areas for Improvement:

    • As with the R version, any workbook layout change would require small adjustments.

  • Gem:

    • The implementation stays close to the stated challenge instead of adding unnecessary complexity.

Difficulty Level

This task is easy to moderate:

  • The business rule is readable, but the workbook still needs a few careful transformation steps.