Ages of edna,ellie and elsa are consequtive integers the sum of their age is 117. their ages are from youngest to oldest. .

If they were all the same age, then it would be (117 / 3) = 39.

But they're not.  So make one of them 40 and another one 38, and
they'll still add up to 117 .

Their ages are 38, 39, and 40 .

What I can't figure out is how three nice women born in the 1970s
wound up with names like that.

i=prt

i= 80(.10) *4

i=32

so basically she earned 32 dollars in interest