How to calculate daily interest<br>Gather the information needed to calculate interest. This includes the amount of money you will be investing or saving, the length of the term and the proposed interest rates. You may have several sets of variables if your intention is to compare alternatives.
a person only needs amount of money and proposed interest rate to calculate interest. 
( z1 need :ARG0 ( z2 person ) :ARG1 ( z3 and :op ( z4 amount :quant-of ( z5 money ) ) :op ( z6 rate :mod ( z7 interest ) :ARG1-of ( z8 propose ) ) ) :mod ( z9 only ) :purpose ( z10 calculate :ARG0 z2 :ARG1 z7 ) )