My client is providing Business Auxiliary services. Invioce is raised in Dollars. Say Invoice of 100$ (including service tax) & rate at the time of raising invoice was Rs.45.00, so my Ivoice amount would be Rs.4500.00 (including service tax), but while the bill is realised it is realised @ rate 44.00. So we have received only Rs.4400.00, n Rs.100 is my foreign fluctuation. We pay service tax on realisation basis. so m i liable to pay service tax on Rs.4400.00 or Rs.4500.00??? M i liable to pay service tax on foreign fluctuation also??