The amount that retailer pays to the wholesaler
Printed Price of an article=Rs.2500
Wholesaler sell it to retailer at 20% discount
∴ Price of the article after discount=2500−20%of2500
⇒2500−20100×2500
⇒2500−500=Rs.2000
Rate of sales tax=10%
∴price of the article after sales tax=2000+10%of2000
⇒2000+10100×2000
⇒2000+200=Rs.2200
Then the retailer pays Rs.2200 to the wholesaler.