Here are three times in five days Republican presidential candidate Donald Trump said he's putting $100 million of his personal funds towards his bid for the presidency. As of Oct. 28, he was more than $33 million short of that, according to Federal Election Commission filings. (Sarah Parnass/The Washington Post)

This post has been updated.

Donald Trump keeps saying that he is going to spend $100 million of his personal funds on his White House bid. “I'll have over $100 million in my campaign, which means $100 million of people that aren't giving me money,” the Republican presidential nominee told supporters in Grand Rapids, Mich., on Monday. One of his sons, Eric Trump, went even further, telling Boston Herald Radio on Monday: “Say what you will, my father can't be bought, he can't be bribed, he can't be coerced. I mean, he's put $100 million of his own money into this campaign.”

Not quite. Since we have been fielding a lot of questions about how much Trump is investing in the race, we decided to break down the numbers:

How much money has Trump contributed to his campaign committee?

As of Friday, when Trump wired his campaign $10 million, he had given a total of $66,108,073.64 in cash and in-kind contributions, according to Federal Election Commission filings. If he wants to hit $100 million, he will have to ante up nearly $34 million more in the next week. We will get fairly quick disclosure of any new donations he makes, since campaigns now have to report any contributions of $1,000 or more within 48 hours.

But I thought he was only loaning his campaign money.

No, all of Trump's financial support is now in the form of contributions. After securing the Republican nomination in June, he converted about $47.5 million of loans into contributions to reassure donors who were worried he would use funds being raised to pay himself back. Here is the letter Trump's campaign sent the FEC confirming his loan forgiveness.

How much has his campaign paid Trump properties?

Trump's campaign spent nearly $9.6 million through Oct. 19 reimbursing his companies and family for expenses, FEC filings show. That includes nearly $6.7 million to his private air charter, Tag Air, and $1.4 million to Trump Tower for rent and payroll. His campaign has made numerous payments to reimburse his hotels, including the new Trump International hotel in Washington, which was paid $13,431 for “facility rental and catering” on Oct. 17. Trump held a news conference at the hotel in September and appeared there again last week for a formal ribbon-cutting.

Trump is required under federal law to reimburse his companies, since candidates cannot accept corporate contributions. Critics have noted that he is not required to hold events at Trump properties, however.

How does Trump rank compared to other self-funding candidates?

He's not the biggest. As our colleague Aaron Blake at The Fix recently noted, independent candidate Ross Perot spent $64 million on his 1992 White House race — about $110 million when adjusted for inflation. In 2010, California GOP gubernatorial candidate Meg Whitman spent $144.2 million ($159.7 million in today's dollars) on her losing bid. Trump does beat former Massachusetts governor Mitt Romney, who shelled out $44.7 million on his 2008 presidential race, or $50.1 million when adjusted for inflation.

Sarah Parnass contributed to this report.