Mutator to compute set and return the value

Hi
I am having trouble working out how to do a mutator that does all three
compute a value set the value and then return it this is what i have so far
this example calculates and returns the value but does it set the value of totalSlices ???? this is the best option so far
public int totalSlices (){
int total = meatSlices + vegSlices;
return (int) total;
this one seems more likely to me but unsure is this a set method as well
public insert (int fiveC)
fiveCentCoin += fiveC;
returne fiveCentCoin;
this is the final example i have come up with but dont know if it sets the value as well
public int calculateCost () {
double cost;
if (age==0) {
age = 0.1;
if (neutered) {
cost = (100/age) + (stay * 3) + SHOTS + TAGS;
} else {
cost = (100/age) + (stay * 3) + SHOTS + TAGS + NEUTER;
return (int) Math.round (cost);
the problem i face i am not sure of how to combine a mutator calculation, set method and return it all in one i havnt done that before and cannot find an example
thanks

I think you're trying to take a hollistic approach to programming. That won't work.
You need to go back and get a good understanding of exactly what each element of Java does.
Sylvia.

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Identification
Diameter
Soak
3" Tank (inches/kft)
AWG
mils
Code
Strands
Shield
Conductor
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Days
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mils
Soak
SD
Injection (3")
Injection (4")
650
2
320
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