Printed price of showpiece = Rs 25,000
Discount on showpiece = 10% of Rs 25,000 = = Rs 2,500
Taxable value of showpiece = Rs 25,000 − Rs 2,500 = Rs 22,500
Rate of GST = 28%
Amount of GST on showpiece = 28% of Rs 22,500 = = Rs 6,300
∴ Purchase price of showpiece = Taxable value of showpiece + Amount of GST on showpiece
= Rs 22,500 + Rs 6,300
= Rs 28,800
So, the total amount shown in the tax invoice is Rs 28,800.
Now,
Amount of CGST = Amount of SGST = × Amount of GST on showpiece = = Rs 3,150
Thus, the amount of CGST is Rs 3,150 and the amount of SGST is Rs 3,150.