Question

In a three-tiered supply chain, a manufacturer produces a table at a certain cost. The manufacturer then sells the table to a wholesaler at a 30% profit margin. Subsequently, the wholesaler sells the table for ₹1300 to a retailer at a 25% profit margin. Finally, the retailer sells the table to the end-consumer at a 30% profit margin. The manufacturer's cost price is ₹(800 +R) less than the retailer selling price of the table. The HCF of R and 18 is: