The cost of a property is estimated to be $ 3500 and the sales price is quoted as $4500, An 18% downpayment is made by the buyer. the remainder is to be received over the period of 8 years. there is a doubt about buyers' ability to pay. how much profit should be recognized attributable to the downpayment if :

1. the installment method is used
2. the cost recovery method is used