Eoin plans to purchase 6.50 pounds of cheese that costs $4.75 per pound. He used the following steps to estimate the cost. Step 1: Round 6.50 pounds up to 7.
Step 2: Round $4.75 up to $5.00.
Step 3: Multiply 5 by 7 to get 35.
Step 4: Conclude that the cost will be just over $35.00.

In which step does Eoin make a mistake?
In step 1, he should have rounded the weight down to 6 pounds.
In step 2, he should have rounded the cost down to $4.00.
In step 3, he chose the wrong operation to calculate cost.
In step 4, he should have concluded the cost would be under $35.00.