Calculate the combined equivalent value of the scheduled payments on the indicated dates. The rate of return that money can earn is given in the fourth column. Assume that payments due in the past have not yet been made.

The total amount of money accrued from a principal of P dollars invested at r% simple interest for 13 years is given by $P+13rP$ . Factor this expression.

A) $P(1+13r)$
B) $14rP$
C) $r(P+13)$
D) $r(1+13P)$
E) $P(r+13)$