Going to fail cmpsci101 unless I can fix this one error

[dakotahelp]

For the death of me I can't figure out this one error. Any help is greatly appreciated. The error is: 1>Source.obj : error LNK2019: unresolved external symbol "float __cdecl calctotaltime(int,float)" (?calctotaltime@@YAMHM@Z) referenced in function _main
1>E:\Project1\Debug\Project1.exe : fatal error LNK1120: 1 unresolved externals

  #include <iostream>
using namespace std;

//Function prototypes

int collectdvdmins ( int dvdmins );

float calctotaltime ( int dvdmins, float totaltime ); 

void displayoutput ( int dvdmins, float totaltime );


int main ( )

{
 	
int dvdmins = 0;
float totaltime = 0;

dvdmins = collectdvdmins ( dvdmins );
totaltime = calctotaltime ( dvdmins, totaltime );
displayoutput( dvdmins, totaltime );

system ("PAUSE");

return 0;

}

//Function Defintions 

int collectdvdmins ( int dvdmins )
{
cout << "Enter the total DVD runtime in minutes./n";
cin >> dvdmins;
return dvdmins;
}

float calctotaltime (int dvdmins , float totaltime )
{
totaltime = dvdmins/60;
return totaltime;
}

void displayoutput ( int dvdmins, float totaltime )
{
cout<< "DVD runtime\n\n";
}

[E3h7X9L8]

the syntax is good, the problem is with your compiler...