Let's say for example that the business is taking in $2000 of revenue. That is the amount that the business collected for it's services - like for fixing the computer. What if though it costs $500 for the equipment (that's an expense). Now they only made $1500. Now the customer complains and says that the computer isn't fixed properly so the company sends out a techie for 2 additional hours. They need to pay their employee (another expense). Now the $1500 is down to $1400. They would have utilities to keep their lights on and insurance and many other expenses.
Your profit looks like this:
Profit = Revenue - Expenses
One gallon is 3.7854 liter so 4 liters are more than one gallon.
Phishing involves the use of the Internet to steal important information.
Shoulder surfing refers to people spying on other people while they are using an ATM. Skimming a credit card refers to thieves using a device in ATMs to steal information from cards. Dumpster diving refers to picking trash from dumpsters.