I do not understand what "professinal tax" means, but here is a generic response to the question about calculating tax.
EXAMPLE:
In cell B2 enter tax rate.
In cell B3 enter amount to which tax will apply.
In cell B4 enter the formula =B3*B2 and observe the tax amount.
You can calculate quantity in Excel with the SUM function.
formula
The loan constant formula in Excel is PMT(rate, nper, pv). This formula can be used to calculate loan payments by inputting the interest rate (rate), the number of payment periods (nper), and the loan amount (pv). Excel will then calculate the fixed payment amount needed to pay off the loan over the specified period.
The formula you use depends upon what you are trying to calculate. If you want to multiply two cells (e.g. A1 and C2), the formula would be =A1*C2.
To calculate portfolio variance in Excel, you can use the formula SUMPRODUCT(COVARIANCE.S(array1,array2),array1,array2), where array1 and array2 are the returns of the individual assets in your portfolio. This formula takes into account the covariance between the assets and their individual variances to calculate the overall portfolio variance.
=SUM(D7:E20)
FREQUENCY(data_array, bins_array). See related links for details and examples.
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Calculate means Excel will evaluate formulas and functions to display the result. You can turn calculate to manual or auto. When it is on auto, everything is updated in real time. Manual will update when you open Excel or requires to you click the calculate button every time you want to see results.
Excel can do any calculations. It won't have that particular requirement already built in, but once you know how to do calculations with Excel and once you know what is required to do the calculation you need, you can then build formulas to do it. Something like that would not be done in a single formula. You would have a number of formulas to calculate the different elements. It can definitely be done. A basic knowledge of Excel and knowledge of the process required to calculate your requirement, which you can probably get through the authorities, probably on their website or through documentation they provide, is what you will need.
Put the rate in a cell, let us use B23. Calculate the new rate in cell C23 using this formula:=B23*1.05
In Excel an equation can be a formula. All formulas in Excel must start with the equals sign. That is what tells Excel it is a formula.