Answer :

Sure, let's break down the problem step-by-step:

Given:
- The number of dozens of pens purchased: 5 dozen.
- The cost price (C.P.) per pen: Rs 25.
- The selling price (S.P.) per pen: Rs 24.
- One dozen = 12 pens.

Step-by-Step Solution:

1. Calculate the total number of pens purchased:
- Since 1 dozen = 12 pens,
- Therefore, 5 dozens = 5 12 = 60 pens.

2. Calculate the total cost price:
- The cost price per pen is Rs 25.
- Thus, the total cost price for 60 pens = 60
25 = Rs 1500.

3. Calculate the total selling price:
- The selling price per pen is Rs 24.
- Therefore, the total selling price for 60 pens = 60 24 = Rs 1440.

4. Find the loss:
- Loss = Total Cost Price - Total Selling Price
- Loss = Rs 1500 - Rs 1440 = Rs 60.

5. Find the loss percent:
- Loss percent = (Loss / Total Cost Price)
100
- Loss percent = (60 / 1500) * 100 = 4.0%

Summary of Results:
(i) The stationer's loss is Rs 60.
(ii) The loss percent is 4.0%.