I need help creating a formula that will calculate the difference between cells

Eample:

Cell A1is the amount of  my pos system saids we charged that day $500

Cell B1is the amount of cash we deposited for that day  $450

Cell C1= i need it to show me the difference between those Cell A1 & Cell B1 ( I want the answer to be -$50)

How do i create a formula that will give that answer?