Answer :

Certainly! Let's solve this step-by-step.

1. Identify the given information:
- The cost of 7 books is "Sh brood".

2. Understanding the term "Sh brood":
- The term "Sh brood" is not a numerical value that we can use directly for calculations. Normally, "Sh" might be an abbreviation for a currency like Shillings. However, "brood" seems to be a placeholder or non-numeric term.

3. Calculating the cost per book:
- Since "Sh brood" is not a numeric value, we cannot directly calculate the cost for a single book. Normally, we would divide the total cost of 7 books by 7 to get the cost per book.
- For example, if the cost was "Sh 70", each book would cost "Sh 70 / 7 = Sh 10". But because we do not have a valid numeric value, we cannot perform this division.

4. Trying to determine the total cost for 2 dozen books:
- A dozen equals 12 books. Therefore, 2 dozen books equals 24 books.
- Generally, we would multiply the cost per book by 24 to find the total cost for 24 books.
- For example, if each book cost "Sh 10", 24 books would cost "Sh 10 * 24 = Sh 240". But we cannot proceed with this calculation without a valid numeric cost.

5. Conclusion:
- Given the term "Sh brood" does not translate into a numeric value, it is impossible to compute the specific costs.
- Therefore, our final answer is:
- "Unknown cost value for 'Sh brood'. Unable to perform calculation."

This conclusion is based on the understanding that without a numeric cost, the calculations cannot be carried out.