The most of the calculator does not work
I could not get:
-CST (cost) to accept any value; PRC (price) to accept any value; thus I could not calculate MAR (margin) or MU (markup) as a result.
-K (constant operation) did not work.
-EFF% (effective interest rate) did not work
-IRR/YR (Internal rate of return), NPV did not work.
-at this point I gave up.
As long as you don’t need financial operations to work on a financial calculator, it is an attractively designed app. There is some potential in the design as it handles irregular cash flows in table form but given that only N, i/YR, PV, PMT and FV seemed to have been through quality control it is difficult to have any confidence in this app. Inexplicably poor quality control.
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10bii+ Financial Calculator, v2.0