count the occurrences in another column (i.e. dollars bid) from the two bidders

I have two columns of data - the individual who bid a job and the amount of dollars the bid was. I'm trying to count who bids the most jobs and who bids the most dollars. I assume COUNTIF will figure out the quantity of bids by a person if I can figure out that formula but how do you count the occurrences in another column (i.e. dollars bid) from the two bidders (in this case Mike and Chris)? Any help is appreciated - and my apologies for a basic question but I did do some searching and feel like I'm missing minor issues with my formulas because they aren't working.