Grocery shopping price comparison worksheet for students to calculate the best value for jam and juice purchases.

Let's solve both problems step by step.

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Problem 1: Which jar of jam should you buy?

You only need one jar of 500 ml jam. We have three options:

#### Option A:
- Price: $5.50
- Alternative deal: $4.50 or 2 for $7.00
- Since you're buying only one, the best price is $4.50 (the single price), not the 2-for-$7.00 deal, which would be $3.50 per jar if you bought two — but we’re only buying one.
- So A = $4.50

> Wait! The label says “$5.50” and then “$4.50 or 2 for $7.00”. That suggests the regular price is $5.50, but there’s a discount: either buy it for $4.50, or get 2 for $7.00.

So the best single price for Option A is $4.50.

#### Option B:
- Price: $3.99

This is straightforward — just $3.99.

#### Option C:
- Price: $4.75
- With store card: $1 off → $4.75 - $1.00 = $3.75

Now let’s compare the final prices:
- A: $4.50
- B: $3.99
- C: $3.75 (with store card)

✔ Best price: Option C at $3.75

> But wait — does the store card apply to all? The problem says “with your store card,” so assume you have the card.

So, C is the cheapest.

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✔ Answer for Jam:

Buy Option C — it costs $3.75 with your store card, which is cheaper than A ($4.50) and B ($3.99).

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Problem 2: Which juice should you buy to get 4L?

You need 4 liters of juice. Let's analyze each option and calculate cost per liter or total cost for 4L.

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#### Option A: 1L Juice
- Price: $2.79
- Deal: 2 for $5 (even if you buy 1)
- So, if you buy 1, you pay $2.79
- If you buy 2, you pay $5 → $2.50 per liter
- But since you need 4L, let's see what happens when you buy 4:

But the deal is "2 for $5", even if you buy 1 — meaning each pair costs $5, so:

- For 4L: Buy 2 pairs → 2 × $5 = $10
- Cost per liter: $10 / 4L = $2.50/L

Alternatively, could you buy 4 singles at $2.79 each? That would be $11.16 — worse.

So best way: buy 2 sets of 2 → $10 for 4L

→ Total: $10

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#### Option B: 2L Juice
- Price: $4.75
- No special deal mentioned
- To get 4L: buy 2 containers
- Total cost: 2 × $4.75 = $9.50

→ Total: $9.50

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#### Option C: 500ml Juice
- Price: $1.40
- With store card: 20¢ off → $1.20 per 500ml
- 500ml = 0.5L
- You need 4L → 4 / 0.5 = 8 containers
- Each costs $1.20 with card
- Total cost: 8 × $1.20 = $9.60

→ Total: $9.60

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Now compare total cost for 4L:

| Option | Total Cost for 4L |
|--------|-------------------|
| A | $10.00 |
| B | $9.50 |
| C | $9.60 |

✔ Best value: Option B at $9.50

Even though C has a discount, you need 8 small bottles, and the total is slightly more than B.

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✔ Answer for Juice:

Buy Option B (2L juice) — two containers for $9.50 is the cheapest way to get 4L.

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✔ Final Answers:

Jam:
Buy Option C — $4.75 − $1.00 = $3.75 (cheapest)

Juice:
Buy Option B — 2 × $4.75 = $9.50 (cheapest for 4L)

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Show Your Work (as requested):

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Jam:
- A: $4.50 (discounted single price)
- B: $3.99
- C: $4.75 − $1.00 = $3.75
- $3.75 < $3.99 < $4.50 → Buy C

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Juice:
- Need 4L
- A: 2 for $5 → 2 sets = 4L → 2 × $5 = $10.00
- B: 2 × $4.75 = $9.50
- C: 8 × $1.20 = $9.60
- $9.50 < $9.60 < $10.00 → Buy B

✔ Final Decision:
- Jam: C
- Juice: B