Complete the following, using exact interest. (Use Days in a year table.) (Do not round intermediate calculations. Round the "Interest" and "Maturity value" to the nearest cent.)

Please help me work these problems out. Explain the process of working them out too to help me better understand them.
Consider the provided table,
The exact time is find as;
Given date borrowed = 7 July
Date repaid = Jan 10
So, total number of days from 7 July to Jan 10 is 187 days.
Thus, the exact time is 187 days.
Given principal = $1,200
Interest rate = 12%
The interest is find as,
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