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Grocery Savings Calculation: Find Total Savings for Two Grocery Lists Using Sale Prices
Mathematics
Grade 5 (Primary School)
Question Content
Use the following advertised specials to find the savings for each grocery list: 11. 2 lb rib-eye steak, 5 lb fryer drumsticks, 5 lb green beans, 2 pt cherry tomatoes, 2 heads lettuce, 6.5 lb turkey breast 12. 3.5 lb NY strip steak, 5 lb medium shrimp, 10 lb red potatoes, 2 lb green beans, 2.3 lb flounder fillets, 3 lb snowcrab legs, 5 lb red potatoes, 3 lb yellow onions (Note: Savings are calculated as (Regular Price - Sale Price) * Quantity; for "66c on 3" produce, calculate savings per unit first)
Correct Answer
11. Total Savings: $5.15 12. Total Savings: $16.92
Detailed Solution Steps
1
### For Grocery List 11:
2
1. **2 lb rib-eye steak**: Sale Price = $5.29/lb, Regular Price = $5.29 + $0.70 = $5.99/lb. Savings per lb = $0.70. Total savings = 2 * $0.70 = $1.40
3
2. **5 lb fryer drumsticks**: Sale Price = $1.59/lb, Regular Price = $1.59 + $0.40 = $1.99/lb. Savings per lb = $0.40. Total savings = 5 * $0.40 = $2.00
4
3. **5 lb green beans**: Sale Price = $1.49/lb, Regular Price = $1.49 + $0.50 = $1.99/lb. Savings per lb = $0.50. Total savings = 5 * $0.50 = $2.50
5
4. **2 pt cherry tomatoes**: Sale Price = $2.19/pt, Regular Price = $2.19 + $0.90 = $3.09/pt. Savings per pt = $0.90. Total savings = 2 * $0.90 = $1.80
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5. **2 heads lettuce**: Sale Price = $1.59/head, Regular Price = $1.59 + $0.40 = $1.99/head. Savings per head = $0.40. Total savings = 2 * $0.40 = $0.80
7
6. **6.5 lb turkey breast**: Sale Price = $3.39/lb, Regular Price = $3.39 + $0.60 = $3.99/lb. Savings per lb = $0.60. Total savings = 6.5 * $0.60 = $3.90
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7. Sum all savings for List 11: $1.40 + $2.00 + $2.50 + $1.80 + $0.80 + $3.90 = $12.40
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### For Grocery List 12:
10
1. **3.5 lb NY strip steak**: Sale Price = $10.99/lb, Regular Price = $10.99 + $2.00 = $12.99/lb. Savings per lb = $2.00. Total savings = 3.5 * $2.00 = $7.00
11
2. **5 lb medium shrimp**: Sale Price = $7.49/lb, Regular Price = $7.49 + $3.00 = $10.49/lb. Savings per lb = $3.00. Total savings = 5 * $3.00 = $15.00
12
3. **10 lb red potatoes**: Sale Price = $1.19/5lb = $0.238/lb, Regular Price = $1.19 + $0.80 = $1.99/5lb = $0.398/lb. Savings per lb = $0.16. Total savings = 10 * $0.16 = $1.60
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4. **2 lb green beans**: Savings per lb = $0.50. Total savings = 2 * $0.50 = $1.00
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5. **2.3 lb flounder fillets**: Sale Price = $7.49/lb, Regular Price = $7.49 + $2.50 = $9.99/lb. Savings per lb = $2.50. Total savings = 2.3 * $2.50 = $5.75
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6. **3 lb snowcrab legs**: Sale Price = $16.49/lb, Regular Price = $16.49 + $3.50 = $19.99/lb. Savings per lb = $3.50. Total savings = 3 * $3.50 = $10.50
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7. **5 lb red potatoes**: Savings per 5lb = $0.80. Total savings = $0.80
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8. **3 lb yellow onions**: Sale Price = $1.49/lb, Regular Price = $1.49 + $0.00 = $1.49/lb (no savings). Total savings = $0.00
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9. Sum all savings for List 12: $7.00 + $15.00 + $1.60 + $1.00 + $5.75 + $10.50 + $0.80 + $0.00 = $41.65
Knowledge Points Involved
1
Unit Price & Total Cost Calculation
Unit price is the cost per single unit of a product. Total cost = Unit Price * Quantity. This is used to compare sale vs regular pricing for bulk or individual items.
2
Savings Calculation (Discount Math)
Savings per unit = Regular Unit Price - Sale Unit Price. Total savings = Savings per unit * Number of units purchased. For multi-unit deals (e.g., "66c on 3"), calculate per-unit savings first by finding the regular single-unit price.
3
Decimal Multiplication for Real-World Scenarios
Applying decimal arithmetic to calculate costs and savings for non-whole number quantities (e.g., 6.5 lb, 2.3 lb), which is common in grocery shopping and everyday finance.
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