The rupee trimmed its early losses against the American currency but was still quoted down by 18paise to 54 rupees 32 paise per dollar on month-end dollar demand from importers despite weakness of dollar in overseas.The rupee resumed lower at 54 rupees 24 paise per dollar as against the last closing level of 54 rupees 14 paise per dollar and dropped further to a low of 54 rupees 38 paise per dollar before quoting at 54 rupees 32 paise per dollar.