Issues with getting data form a text file

[warburp]

I have to make a program that grabs two values from a txt file and multiplies them together but it's getting totally random values. The output of the following code is: This is the total bill 922337189306963456.00Press any key to continue...

// This program will read in the qunatity of a particular item and its price.
// It will then print out the total price.
// The input will come from a data file and the output will go to
// an output file.

// Cody Steffens

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


int main()
{
   	ifstream dataIn;		// defines an input stream for a data file
	ofstream dataOut;		// defines an output stream for an output file
	int quantity;			// contains the amount of items purchased
	float itemPrice;		// contains the price of each item
	float  totalBill;		// contains the total bill.  The price of all items

	dataIn.open("transaction.txt");  // This opens the file.
	dataOut.open("bill.out");

	// Fill in the appropriate code in the blank below
	cout << setprecision(2) << fixed << showpoint;  // formatted output


	// Fill in the input statement that brings in the 
	// quantity and price of the item.
	dataIn >> quantity;
	dataIn >> itemPrice;

	// Fill in the assignment statement that determines the totalbill.
	totalBill = float(quantity) * itemPrice;

	// Fill in the output statement that prints the total bill, with a label,
	// to an output.
	cout << "This is the total bill " << totalBill;

	system ("pause");

	return 0;
}

the text file looks as follow

22
10.98