在买房合同上：
[size=9.000000pt]CONDITIONS OF SALE
The property and the chattels included in the sale are sold on these Particulars and Conditions of Sale, the General Terms of Sale and any Further Terms ofSale.
[size=7.000000pt]GST will be payable in accordance with the statement of the purchase price in the Memorandum of Contract.
[size=7.000000pt]The GST date is:
The interest rate for late settlement is 15% p.a.
[size=9.000000pt]CONDUCT OF AUCTION
The purchaser shall immediately on the completion of the auction ：
[size=7.000000pt]Sign the Memorandum of Contract failing which the auctioneer may sign on behalf of the purchaser,
[size=7.000000pt]Pay to the vendor's licensed real estate agent the deposit being 10% of the purchase price unless otherwise agreed; and
[size=7.000000pt]Complete its GST information in Schedule 1, if applicable. 这里为什么会有gst？是消费税还是别的意思呢？