Let's go through each part of the question step-by-step:
CP: ₱80, SP: ₱100 → Calculate profit or loss.
The Cost Price (CP) is ₱80 and the Selling Price (SP) is ₱100.
Profit or Loss Calculation: Profit = SP − CP = 100 − 80 = ₱20
Since the SP is greater than the CP, there is a profit.
Profit = ₱20
CP: ₱120, SP: ₱150 → Calculate profit or loss.
The Cost Price (CP) is ₱120 and the Selling Price (SP) is ₱150.
Profit or Loss Calculation: Profit = SP − CP = 150 − 120 = ₱30
Since the SP is greater than the CP, there is a profit.
Profit = ₱30
SP: ₱1,000, 20% discount → Calculate selling price after discount.
The Selling Price (SP) is ₱1,000 with a 20% discount.
Discount Calculation: Discount = ( 100 20 ) × 1000 = ₱200
Selling Price after Discount: Final SP = 1000 − 200 = ₱800
Selling Price after Discount = ₱800
SP: ₱2,000, 15% then 10% successive discounts → Calculate selling price after successive discounts.
Start with the original SP of ₱2,000.
First Discount (15%): First Discount = ( 100 15 ) × 2000 = ₱300 Price after First Discount = 2000 − 300 = ₱1700
Second Discount (10%): Second Discount = ( 100 10 ) × 1700 = ₱170 Price after Second Discount = 1700 − 170 = ₱1530
Selling Price after Successive Discounts = ₱1530
CP: ₱200, Mark-up: 30% → Calculate selling price.
The Cost Price (CP) is ₱200 with a 30% mark-up.
Mark-up Calculation: Mark-up = ( 100 30 ) × 200 = ₱60
Selling Price Calculation: Selling Price = 200 + 60 = ₱260
Selling Price = ₱260
These calculations involve basic percentage concepts and algebra, commonly covered in high school mathematics. Remember, understanding how to calculate profit, loss, discounts, and mark-up is useful in real-life situations, like shopping or business transactions.