Determine the discount period for a promissory note subject to the given terms.

$\backslash$table$[[\backslash$table$[[$Loan$],[$Made on$]],\backslash$table$[[$Length of$],[$Loan $($Days$)]],\backslash$table$[[$Date of$],[$Discount$]],\backslash$table$[[$Discount$],[$Period $($Days$)]]],[$Feb$.19,210,$July $20,]]$

Click the icon to view the Number of Each of the Days of the Year table.

The discount period is days.