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1. $25

2. $25+$50=$75

3. $25+$50+$75=$150

4. $25+$50+$75+100=$250

5. $25+$50+$75+100+$250=$500

6. $25+$50+$75+100+$250+$500=$1000

7. $25+$50+$75+100+$250+$500+$1000=$2000

$25, $2000.

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$2000, 4 , $8000.

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