The Sri Lankan rupee closed slightly firmer on Friday as dollar sales by banks due to inward remittances surpassed demand for the US currency from importers to pay for their purchases, dealers said. The spot rupee, which traded at 153.19 per dollar earlier in the day, recovered to close at 153.05/12, compared with Thursday's closing level of 153.10/20. "There was importer demand, but being the month-end we saw some remittance flow, which strengthened the rupee," said a currency dealer who did not wish to be named.