Verb
reckon up (third-person singular simple present reckons up, present participle reckoning up, simple past and past participle reckoned up)
To add up; count up; compute the amount of; tally; come to an accounting of
Do not indulge in dreams of having what you have not, but reckon up the chief of the blessings you do possess, and then thankfully remember how you would crave for them if they were not yours. Marcus Aurelius