Invoice process as per new gst

Dear Sir, Please clarify the invoice process (as per new GST)

I purchase X material @ 60/- per kg. Quantity: 2000 kgs  (from Out state)

they charged basic price 120000/-

IGST (18%): 21600/-

transport: 10000/-

Total: Rs.151600/-

Now My value addition 10- per kg

now i want to sell in local

basic price : 140000/-

CGST 9%12600/-

SGST 9% 12600/-

transport: 3000/-

Total: 168200/-

Now Please let me know the taxable amount, And is it right?