Bob and his dad visited the hardware store on Saturday. They observed the following transactions:

Mr. Harris bought 4 for $0.50, Mrs. Clarke bought 21 for $1.00, Mr. Montaro bought 1,134 for $2.00, and Ms. Park bought 450 for $1.50. What were they buying?

House Numbers, at 50 cents each. Mrs. Clarke bought the number 21, which is 2 pieces and therefore costs a dollar. Same with the others.

With the limited data, it is impossible to tell. Repost with adequate data.

I found out that its like Address numbers or something. I looked it up on google

To determine what Bob and his dad observed at the hardware store, we need to analyze the given transactions. Let's break down each transaction:

1. Mr. Harris bought 4 for $0.50.
2. Mrs. Clarke bought 21 for $1.00.
3. Mr. Montaro bought 1,134 for $2.00.
4. Ms. Park bought 450 for $1.50.

From these transactions, it appears that each person bought a different quantity of items for a specific price. To determine what they were buying, we can perform calculations based on the prices and quantities.

1. Mr. Harris bought 4 items for $0.50. To find the price per item, we divide the total price by the quantity: $0.50 ÷ 4 = $0.125 per item. So, Mr. Harris bought items that cost $0.125 each.

2. Mrs. Clarke bought 21 items for $1.00. The price per item can be calculated similarly: $1.00 ÷ 21 = $0.0476 per item (rounded to four decimal places). Thus, Mrs. Clarke bought items that cost $0.0476 each.

3. Mr. Montaro bought 1,134 items for $2.00. Dividing the total price by the quantity gives us: $2.00 ÷ 1,134 ≈ $0.0018 per item. Therefore, Mr. Montaro bought items that cost approximately $0.0018 each.

4. Ms. Park bought 450 items for $1.50. Performing the necessary calculation, we get: $1.50 ÷ 450 ≈ $0.0033 per item (rounded to four decimal places). Hence, Ms. Park bought items that cost approximately $0.0033 each.

Based on the prices per item, we can conclude that they were buying something priced in different units. However, without additional information, it is not possible to definitively determine what specific items they were purchasing.