The files .xls (of Excel) are related to the exercises given in the .pdf file
Codes for the exercises on the interest rates (file .xls)
Code for the day of the week (file .xls)
Table 1 on the amortization (file .pdf)
Table 2 on the amortization (file .pdf)
Codes for the exercises on the amortization of loans (file .xls)
Codes for (file .xlsx)
Example of EXAM (file .pdf)
Solutions of the EXAM (file .xlsx)