completing form 7203 after a direct purchase of stock

I am trying to determine how to complete form 7203 after a direct purchase of stock.

Here are the facts:

• Shareholder A was 100% owner
• At 12/31/23 his ending stock basis was $100,000
• On 1/1/24 he sold 65 of his 100 shares for $500,000 to new Shareholder B
• The deal was done directly between A and B

For A, would I show on line 13 of his 7203 a reduction of stock basis of $65,000 (65% of his $100,000 basis)?

For B, would I show on line 2 of his 7203 an increase of stock basis of $500,000?