Let the factory’s base cost of one ceiling fan be (₹C).
Step 1: Wholesaler’s markup
The wholesaler marks up the fan by (50%).
Marked price to retailer=1.5C
He then gives a (20%) trade discount.
Retailer’s cost=1.5C×0.8
= 1.2C
Retailer’s markup
The retailer marks up his cost by (40%).
Printed price=1.2C×1.4
=1.68C
Retailer gives 10% discount
Customer pays (90%) of printed price.
Final selling price=1.68C×0.9
=1.512C
Given:
1.512C=18144
So,
C=1.51218144
C=12000
Final Answer
₹12,000
The original factory base cost of one ceiling fan was ₹12,000.