Fidya / Kaffara
Fidya can be calculated as $10 for each day missed or $300 for all of Ramadan.
Ramadan is a month of blessing, in which Allah covers you with blessing, for He sends down mercy, decreases sins and answers prayers … In it, Allah looks at your competition in good deeds, and boasts about you to His angels. So show Allah goodness from yourselves.
Prophet Muhammad (PBUH)
[Tabarani]