Final answer:
To calculate the total purchase price, you need to consider the cost of the items, sales tax, and tip. The total purchase price is obtained by adding these three amounts together.
Step-by-step explanation:
To calculate the total purchase price, you need to consider the cost of the items being purchased, as well as any additional fees or charges such as sales tax and tip. Let's assume you have a total cost of $100 for the items. To calculate the sales tax, you can multiply the total cost by the sales tax rate, which is 4% in this case. So, the sales tax would be $100 * 0.04 = $4.
To calculate the tip, you can multiply the total cost by the tip rate, which is 20% in this scenario. Thus, the tip would be $100 * 0.20 = $20.
Finally, to find the total purchase price, you add the total cost, sales tax, and tip together. Therefore, the total purchase price would be $100 + $4 + $20 = $124.