Problem: I have a Form where Users are asked to check off several sets of checkbox custom fields. I would like to calculate how many of each type of checkbox was checked, and display the total number of checked checkboxes of each type in the post template.
Solution: Use the cred_save_data API and the Types Field API to determine which checkboxes were checked and add up the totals for each type of checkbox. Save those totals in 4 new custom fields, and display the values of those custom fields in the post template.