Cancellation of a booked flat

Sir we have booked a flat on 3rd March 2019 with an amount 112000/- and send us the next booking letter and next payment list on 28th March 2019, but due to some financial problem we need to cancel the booked flat. Our letter is ready we will send it on 20th April 2019 with 30 days from receiving their booking letter for next payment. But could not under stand how much they will deduct? Will they forfeited full money or just deduct some from the amount. Their words attached " Cancellation charges : *Before Agreement – Rs. 50,000/- *Cancellation after Agreement – 10% of the total consideration + GST ●● In case of cancellation or withdrawal by the applicant/applicants of this EOI within 21days of issue of allotment by us, the EOI booking amount will be refunded after deducting a sum of Rs.25,000 plus GST as applicable. But in case of cancellation or withdrawal after 21days of issue of provisional allotment by us, entire application money will be forfeited, if provisional allotment issued by us is accepted by you and allotment money paid by you after 21days interest@----will be applicable on allotment money after 21days. But in case of cancellation or withdrawal after acceptance of provisional allotment, a sum of 15% of the total consideration plus GST as applicable will be deducted" Kindly explain us what amount they will deduct?