Please explain the differences between the sale price and the repurchase price from the financial system of the Philippines. 

A sale price is the discounted price at which goods or services are being sold. This price is usually offered for a limited period of time, typically to spur sales during a slow period or to sell off excess inventory. The discount is advertised as a percentage reduction from the normal list price.

while Repurchase Price, the price at which the purchase was made
collateral is to be transferred by the buyer to seller upon completion of a transaction that
is determined in each case (including Transactions Cancellable on Demand) as the
Sum of purchase price and purchase price difference to the date of such determination.

The price or NAV charged to a Shareholder while investing in a perpetual plan is known as the selling price.It may contain sales charges, if applicable.The redemption or redemption price is the price or NAV at which an open-ended fund buys or redeems its shares from shareholders.Where appropriate, it may contain the exit load.

The difference may be due to the exit load.Mutual funds no longer charge an entry load. So your selling price is the net asset value (NAV) of the plan. The repurchase price may differ as an exit load fee applies.

Step-by-step explanation

Repurchase price. Regarding any
Mortgage loan, a price equal to 

(a.) the amount unpaid
Principal amount of the mortgage loan, plus
(b.) interest on such unpaid principal balance the associated mortgage interest rate from the last date on which interest was last paid by or on behalf of the mortgage lender up to the last day
of the month in which the repurchase takes place,
plus 

(c.) reasonable and customary third parties
Costs related to the
Mortgage Loan Transfer
repurchased, less 

(d.) amounts received
with respect to any such Repurchased Mortgage Loan
and retained for future distribution in connection with such a mortgage loan.

Repurchase price.

Regarding any Mortgage loan, a price equal to (a.) the amount unpaid Principal amount of the mortgage loan, plus
(b.) interest onsuch unpaid principal balance the associated mortgage interest rate from the
last date on which interest was last paid by or on behalf of the mortgage lender up to the last day
of the month in which the repurchase takes place,
plus (c.) reasonable and customary third parties Costs related to the
Mortgage Loan Transfer
repurchased, less (d.) amounts received with respect to any such Repurchased Mortgage Loan
and retained for future distribution in connection with such a mortgage loan.