In the battle for Sen. Rand Paul‘s senate seat, he and his Democratic challenger Jim Gray both spend a bundle on payroll, technology, research, and consultants, according to a review of 1,400 expenditures they’ve made from January 2015 to the end of this April.

Paul has outspent Gray, a construction company executive and Lexington mayor, more than two to one — mostly because Paul’s been campaigning so much longer, their campaign expenditure reports to the Federal Election Commission show.

The reports also show Paul’s campaign really likes Uber; it spent $5,866 just on the ride-hailing service in his total $104,073 for travel.

The bottom line

Overall, Paul spent $2 million from Jan. 2, 2015, to April 27, 2016. His three biggest categories:

1. payroll: $222,740
2. website development: $215,193
3. finance consulting: $195,457

Gray spent $945,911 from Jan. 31 to April 27. His three biggest:

1. advertising: $278,000
2. payroll: $220,703
3. research: $110,600

This spreadsheet lists all of Paul’s expenditures. And this one shows all of Gray’s.