"Per" means "divided by". Price per pound is found by dividing the price by the corresponding number of pounds.
garlic: $92.60/(32.5 lb) = $2.85 per pound
sage: $152.25/(40 lb) = $3.81 per pound
ginger: $74.50/(22.5 lb) = $3.31 per pound
basil: $125.00/(42 lb) = $2.98 per pound
Least to highest, these are garlic, basil, ginger, sage.