FICTIONAL PRACTICE ONLY - NO REAL DATA
Month 2 · Organize information and check arithmetic

Downloaded worksheet. Use only invented case data. The accompanying CSV contains no formulas; calculate and explain values yourself. Work locally. Do not send customer information or enter passwords, account details or identity documents. This file does not enroll, certify, verify graduation or grant a discount.

Reading:
A worksheet helps when columns have clear meanings, units and sources. Keep original data and correct a working copy. Do not mix product subtotal, shipping, confirmed order and received money.

Fictional case:
Invented sheet: 3 notebooks at COP 8,000 and 2 pencils at COP 1,200. Delivery is unknown. A draft calculates products at COP 28,400.

Local activity:
Create product, quantity, unit-price and subtotal columns. Calculate the product subtotal and mark delivery pending. State what would need checking before any charge, without making one.

LOCAL WORK
1. My deliverable:

2. Source and unknowns:

3. Calculation or verification evidence:

4. Correction after reviewing the feedback on the study page:

5. Remaining limits and human decisions:

Feedback remains on: ../etapa-1-en.html#mes-2