Let's match each item with the correct unit price:
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2 1/2 for one dollar
- This means each item costs $1.00 / 2.5 = $0.40 (40 cents each).
- Matched with: 40 cents each.
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$3.78 for 6
- This means each item costs $3.78 / 6 = $0.63 (63 cents each).
- Matched with: 63 cents each.
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20 for $1.56
- This means each item costs $1.56 / 20 = $0.078 (7.8 cents each).
- Matched with: 7.8 cents each.
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1 for $1.58
- This means the price for one item is $1.58.
- Matched with: $1.58 (not listed above, so it remains separate).
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5 at $3.90
- This means each item costs $3.90 / 5 = $0.78 (78 cents each).
- Matched with: 78 cents each.
Now, summarizing the matches:
- 2 1/2 for one dollar - 40 cents each
- $3.78 for 6 - 63 cents each
- 20 for $1.56 - 7.8 cents each
- 1 for $1.58 - $1.58 (not specifically matched, just noted to be separate)
- 5 at $3.90 - 78 cents each