Error on trying to have multiple function in my C++ code

I am doing a project for school and making this program that calls on multiple functions but I seem to keep getting an error that

'TotalValue' cannot be used as a function on line 44 

and I can't seem to fix it. I tried setting mulitple different variables to see if it would change anything but nothing seems to work. Help appreciated!

#include<iomanip>
#include<iostream>
#include<cmath>
using namespace std;

int SurfaceArea (float L, float H, float W, float &SA,float P, float I,float simpI, float T, float &TV, float TotalValue);


int main ()
{

float L, H, W, SA, P, I,T,TV,TotalValue,simpI;

cout << " Enter the Length: ";

cin >> L;

cout << "Enter the Height: ";

cin >> H;

cout << "Enter in the Width: ";

cin >> W;

SurfaceArea(L, H, W,SA,P,I,T,TV,TotalValue,simpI);

cout << "The surface area of your prism is: " << SA;

return 0;
cout << "Enter in your principle: ";

cin >> P;

cout << "Enter in your interest rate: ";

cin >> I;

cout << "Enter in the time: ";

cin >> T;

TotalValue(P,I,T,TV);

cout << "Total value: " <<TV;

}
int SurfaceArea(float L, float W, float H, float &SA)
{

SA = 2.0*(L * W) + 2.0*(L * H) + 2.0*(W * H);

    return 0;
}
int TotalValue(float P, float I, float T,float &TV,float simpI)
{
simpI = I/100;
TV = P*(1+simpI*T);
return 0;
}