Get ready for darkness.
Twilight star Justin Chon tells me that director David Slade's Eclipse isn't exactly taking his lead from Catherine Hardwicke or Chris...You can construct an almost infinite variety of calculators right within your MS EXCEL rent modem application.
Here is how you can construct your own 10-year compounding interest financial calculator that would help you to see, for example, how much your $100 will grow celcom broadband x percent of interest a year, on a year by year basis.
1) Launch a clean worksheet in Excel.
2) Reserve Tmcom cell A1 for your principal dollar amount. Think of this as your deposit?in the bank.
3) Reserve the cell B1 for your annual interest rate (entered as a decimal number like 5.6 or 34.8, etc).
4) In cell C1, enter the following formula into the text input bar just above the spreadsheet and then click the green check-box icon to save the formula into cell C1:
=A1 + ((A1/100) * B1)
This formula will take the amount you enter into cell A1, divide it into 100, and then multiply it by the annual interest rate B1, and then add it to the original A1 amount to give you the total COMPOUNDED amount at the end of year one. For example, for $100 of deposit (A1) at 5% a year (B1), the cheapest broadband isp value should be should be $105.
Now here comes the exciting part.
5) Click and select cell C1 so that Excel should display a black rectangle around the cell. When you bring your cursor to the lower right corner of the cell, your cursor should turn into a streamyx broadband test and slim plus sign (??.
6) Click and drag the cell C1 down as many cells as you want along the C column. This automatically copies the formula in C1 to all the other cells ?but not perfectly. Now you need to adjust each formula slightly.
If you click on the unadjusted cell C2, you will see the following formula:
=A2+((A2/100)*B2)
7) Change this by replacing all A2s with C1?because you would like to have the C1 amount get compounded, not the amount in A2 (which is empty).
So the correct formula for C2 becomes:
=C1+((C1/100)*B1)
Similarly, the correct formula for C10 becomes:
=C9+((C9/100)*B1)
Now your calculator is ready for testing.
Plug in 100 for A1 and 5 for B1 and youll have $162.8 dollars at the end of 10 years.
What if the interest rate went up by one percent to 6%? Change B1 to 6 and you will have $179 dollars at the end of 10 years.
You can easily stretch this calculator to 20 or 30 years by adding the necessary additional rows to column C and adjusting the formula for each cell accordingly, as explained above.
Happy savings!
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Ugur Akinci, Ph.D. is a senior writer and web content consultant with 20 years of experience.
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