Expected values in unit tests

I am coding some unit tests for a MVC 5 internet application.

Should I hard code the expected value in the Assert line of code, or calculate this value from the input values before they have changed.

Here is an example:

I have a function that subtracts the correct balance from an Account object where the Account object has a subscriptionCostPerDay and an accountBalance.

Here is the code:

account1.subscriptionCostPerDay = 0.99M;
account1.accountBalance = 10;

The function that I am testing calculates the subscriptionCostPerDay and subtracts this from the accountBalance. In the above example, the accountBalance should be 9.01 after the function call.

Should the Assert statement hard code the value of 9.01, or should the expected value be calculated from the original object values?

Here are examples of the two different types I am referring to above:

1.

Assert.AreEqual(9.01M, account1Balance, "Account 1 has correct account balance");

2.

decimal expectedAccount1Balance = account1.accountBalance - account1.subscriptionCostPerDay;

Assert.AreEqual(expectedAccount1Balance, account1Balance, "Account 1 has correct account balance");

Thanks in advance.