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The Cozy Corner Bookstore is tracking its inventory of a popular novel throughout a busy Saturday. They start the day with 250 copies of the book.
How many copies of the book did they sell between 3 pm. and 5 pm.?
Let’s track the inventory throughout the day:
1. Start of day: 250 copies
2. After 10 a.m.: 250 – 35 = 215 copies
3. After 11 a.m.: 215 – 48 = 167 copies
4. After 12 p.m.: 167 – 52 = 115 copies
5. After noon shipment: 115 + 150 = 265 copies
6. After 2 p.m.: 265 – 63 = 202 copies
7. After 3 p.m.: 202 – 59 = 143 copies
We know they have 78 copies at 5 p.m., so to find how many were sold between 3 p.m. and 5 p.m.:
143 – 78 = 65 copies
Therefore, they sold 65 copies of the book between 3 p.m. and 5 p.m.
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