请教英文翻译!谢谢!不要机器翻译!!!

1. two points added per one dollar cost.
2.are you interested in taking part in this party ?

1. two points per 1 dollar spent.
2. would you like to come to this party?

1. two points gathered per one dollar cost.
2.Would you like to take part in this party ?

You can earn two points per one dollar purchase.

OR -- You can earn two points for every dollar spent.

Do you have any interest to join (or joining) the party?

1.For every one dollar you spend,you'll integral 2 integrations.

2.Do you take an interest in taking part in this party?

1.Every 1 dollar you costed,you can get 2 points
2.Do you have interest to this party?