Is this calci allowed for cpt exams?

No,this calculator is not allowed as it has 7 functions:add,subtract,multiply,divide,percentage,square root and tax.

Look for a calculator without the tax function like this one here

https://www.letsbuy.com/citizen-desktop-calculator-ct500j-p-25828

Yes,It is allowed,Don't worry it is a very commonly used model,Moreover keep habit of using check & currect buttons to review your calculation.

@ Vikram : Tax button is not restricted.We have used such calculators,Problem is only with Scientific Calculators

theres no problem with using this calci in cpt. But avoid it because you are not allowed to use a calculater with tax function at ipcc and final ,the rest of the functions are okay. look for a citizen ct-512. or a calci which has the same functions as ct-512