I’m hopelessly confused with this homework and it’s due tomorrow, i just need answers for now, pleaaase

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

Ineed ! the person who answers and shows their work on they got the answer first will be marked the !

A6 ounce bottle of dressing costs $1.56 a 14 ounce bottle costs $3.36 a 20 ounce bottle costs $5.60 which has the lowest cost per ounce