In this scenario, B bought a refrigerator from S for P20,000.00 payable in 20 installments at P1,000.00 per month. After paying 6 installments, B defaulted on the payment of the seventh and eighth installments.
To calculate how much S may collect from B if S decides to exact fulfillment of the obligation, we need to determine the applicable rule for this scenario. In this case, we can look at the rule on installment sales under the Civil Code of the Philippines.
According to Article 1484 of the Civil Code of the Philippines, in case of a sale of goods on installment, the seller may either exact fulfillment of the obligation or cancel the sale and demand the return of the goods. If the seller chooses to exact fulfillment of the obligation, the unpaid installments shall be considered as overdue and the seller may also claim payment of the interest agreed upon, as well as damages, if applicable.
In this scenario, since S decides to exact fulfillment of the obligation, the unpaid installments of the seventh and eighth months shall be considered overdue. S may also claim payment of the interest agreed upon, as well as damages, if applicable.
Assuming that there is an interest rate agreed upon by the parties, S may also claim payment of the interest on the unpaid installments. The amount of damages, if applicable, will depend on the specific circumstances of the case.
To determine the exact amount that S may collect from B, we need to know the interest rate agreed upon and the amount of damages, if any. Without this information, we cannot provide a definite answer to the question.