
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
During the "New Year's Day" period in 2023, Xin Ya Shopping Mall held a promotional event. According to the total one-time shopping amount based on the marked price of the goods, the corresponding discount methods are as follows: ① If it does not exceed $600, no discount will be given; ② If it exceeds $600 but does not exceed $900, an 20% discount will be given based on the total shopping amount; ③ If it exceeds $900, an 20% discount will be given on the first $900, and a 40% discount will be given on the amount exceeding $900. During the promotion, Xiao Wang and his mother each chose an item. If they pay separately, they should pay $560 and $640 respectively. If they pay together, they only need to pay a total of ______ yuan.

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