Which one of the following costs more?
I. 200 packets of R 250 each
II. 20 dozens of R 250 each item

The correct option is II.

To determine which option costs more, let us calculate the total cost for both cases step-by-step.

Step 1: Calculate the total cost for Case I
In Case I, there are 200 packets, and each packet costs R 250.
$\text{Total cost for I}=200\times 250=\text{R}\mathrm{50,000}$

Step 2: Calculate the total cost for Case II
In Case II, there are 20 dozens of items, and each item costs R 250.
Recall that 1 dozen is equal to 12 items.
Therefore, 20 dozens contain:
$\text{Total items}=20\times 12=240\text{items}$ Now, calculate the total cost for 240 items at R 250 per item:
$\text{Total cost for II}=240\times 250=\text{R}\mathrm{60,000}$

Step 3: Compare the two costs
Since R 60,000 is greater than R 50,000, Case II costs more than Case I.