she racked her brains, but there was nothing she could tell him:
think hard, put one's mind to something, give much thought to something, concentrate, try to remember, puzzle over something, cudgel one's brains, furrow one's brow;
informal scratch one's head.
□ rack upinformal
the privately-held chain racks up sales of $3.3 million:
achieve, attain, accomplish, gain, earn, win, succeed in making, reach, make, get, obtain;