GST stands for Goods Service Tax. President of India Narendra Modi launched GST in India on 1st July, 2017. It was applied by the state and central goverments. SST stands State service tax and CST stands Central service tax. Goods and services taxed at following rates 5% (2.5% SST & 2.5% CST), 12% (6% SST & 6% CST),18% (9% SST & 9% CST) and 28% (14% SST & 14% CST). GST replaced several taxes like excise duty, service tax, surcharge, value added tax and more.
GST Amount = Original Price x GST(%age) / 100
Net Cost = Original Price + GST Amount
GST Amount = 1500 x (18 / 100)
GST Amount = Rs.270
Net Cost = 1500 + 270 = 1770