The records of each transaction relating to the production and sale of the fruit from the pejibaye palm on one farm in Costa Rica are tabulated and summarized herein. We find a fairly straight-line relationship between the number of sacks harvested per month and the monthly costs of harvesting them at about 3.16 colones (US$.45) corrected for inflation per sack (with r2 = .36), and also between the value to the farmer of the crop per month and the cost of harvesting it at about 11.5%. The relationship between the cost of harvesting a sack and its value per sack per month, corrected for inflation, is very similar, 11.6% (with r2 = .33). The average value of a 100 kilogram sack is 27.1 colones (US$4.07) with a standard deviation of 7.91 colones (US$1.19). No relation is found between day to day prices and the volume of sale on adjacent days. The peak of the harvest season in terms of volume and value of the pejibaye is in October and November, with production frequently important in September and December. Regarding the days of the week on which transactions take place, Thursday is the most frequent day on which some of the harvest is sold; however, on Friday slightly more of the harvest is marketed, though the frequency of marketing is less. Saturday sales tend to be the largest of any day of the week. However, sales are not made as often on Saturday, and the totals for that day are reduced. The pejibaye is an important staple in the American tropics because of its high starch, fat, and vitamins A and C content. The forms in production at present have great variability, but varieties can be selected from this gene pool that will provide for the improvement of the fruit and the eradication of the spines on the trunk and leaves of the pejibaye that, ultimately, may be dispersed throughout the tropical world.