Bank statements. One sort of financial record is a bank statement. Your bank will regularly send a statement containing information showing income (credits) and outgoings (debits) on your bank account.
They're synonyms. Gain is the most general. Attain usually means to reach a goal or milestone (he attained the rank of captain). Obtain usually implies careful planning or some effort to get to the thing or goal. But they have probably something like 80% overlap in meaning.
The Difference Between Knowledge and Wisdom. Knowledge: Having wisdom to know the difference; wisdom is praying for more. Knowledge is doing right; wisdom is motivation to do still better. Knowledge is having good intuition (a combination of gut and deliberation): wisdom is still honing your intuitions.