
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Suppose you have two bank cards for making purchases: a debit card and a credit card. Today you decided to buy airline tickets worth 20,000 rubles. If you pay for the purchase with the credit card (the credit limit allows it), you will have to repay the bank within $\mathrm{N}$ days to stay within the grace period in which the credit can be repaid without extra charges. Additionally, in this case, the bank will pay cashback of $0.5 \%$ of the purchase amount after 1 month. If you pay for the purchase with the debit card (with sufficient funds available), you will receive a cashback of $1 \%$ of the purchase amount after 1 month. It is known that the annual interest rate on the average monthly balance of funds on the debit card is $6 \%$ per year (Assume for simplicity that each month has 30 days, the interest is credited to the card at the end of each month, and the interest accrued on the balance is not compounded). Determine the minimum number of days $\mathrm{N}$, under which all other conditions being equal, it is more profitable to pay for the airline tickets with the credit card. (15 points)

Present the answer in LaTex format: \boxed{Your answer}
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