Apple's profits typically skyrocket during the fourth quarter, when new models of the iPhone often arrive and shiny new devices are purchased as holiday gifts.<br />Last year Apple notched a record $18 billion in profit during this period, the largest ever recorded by a single public corporation.<br />This year the company topped that, generating a profit of $18.4 billion on $75.9 billion in revenue during the last three months of 2015.<br />The average sale price for its best selling devices, the iPhone, iPad, and Mac, was also a record high, boosting Apple's margins to 40.1 percent.<br />But, the company also predicted that revenue for the second quarter of 2016, which for Apple is the first three months of this year, would come in between $50 and $53 billion.