
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
The sales of a certain brand of TV in a shopping mall were good. According to statistics, the monthly sales volume $y$ (units) in the first half of last year (January to June) had a linear relationship with the month $x$, where the sales volume in February was 560 units, and in March was 570 units.  
(1) Find the function relationship between the monthly sales volume $y$ (units) and the month $x$;  
(2) It is known that the price per unit in June was 3200 yuan. Due to the impact of the international economic situation, starting from July, the national economy experienced inflation, and the prices of goods generally rose. The price of this brand of TV in July increased by $m\%$ compared to June, but the sales volume in July decreased by $2m\%$ compared to June. In order to promote sales, the mall decided to offer a 10% discount on this brand of TV in August. Stimulated by this policy, the sales volume of this brand of TV increased by 220 units compared to July, and the total sales revenue increased by 15.5% compared to June. Find the value of $m$.

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