How do format a quote within a quote within a quote?

1. In American English, use double quotation marks for quotations and single quotation marks for quotations within quotations.

2. In British English, use single quotation marks for quotations and double quotation marks for quotations within quotations.

the cost of attendance or coa is an approximate budget for the cost of attendance of the whole academic year. in order to calculate this, universities take into consideration many factors like room and board, tuitions and fees, books, transportation and personal expenses such as medicine, laundry, clothing. all these factors combined make up the final sum to the cost of attendance in each university.