Marketing tidbits

Just returned after a quick trip to Chennai. The idly shop at the Shamshabad airport (Rajiv Gandhi Intl) did something that surprised me. The price of what I ordered was listed as x and when the cashier rung up my order, I saw a y on my receipt (y = x + Rs.10) against the item. This was before VAT. I asked him why and he pointed me to a footnote on the menu board which read "* All price excluding state taxes". The second instance on the Jet Airways flight was less of a surprise, but was interesting nevertheless. Water, which is provided for free, was served by a male while food and other items one had to pay for were served by an attractive air hostess. Wonder whether in flight sales would take a tumble if a guy tried selling food and other trinkets.