Jim bought two shirts that were originally marked at $40 each. One shirt was discounted 20% and the other was discounted 25%. The sale tax was 4.5%. How much did he spend in all?

40 * 0.8 = 32

40 * 0.75 = 30

30 + 32 = 62

62 + 2.79 = 64.79

I missed the fourth step.

62 * 0.045 = 2.79

To find out how much Jim spent in all, we need to calculate the cost of each shirt after the discount and then add the sales tax. Let's break it down step-by-step:

Step 1: Calculate the discount for the first shirt:
The first shirt was discounted by 20%.
So, the discount amount would be 20% of $40, which is (20/100) * $40 = $8.

Step 2: Calculate the cost of the first shirt after the discount:
The original price of the first shirt was $40.
After the discount, the cost would be $40 - $8 = $32.

Step 3: Calculate the discount for the second shirt:
The second shirt was discounted by 25%.
So, the discount amount would be 25% of $40, which is (25/100) * $40 = $10.

Step 4: Calculate the cost of the second shirt after the discount:
The original price of the second shirt was $40.
After the discount, the cost would be $40 - $10 = $30.

Step 5: Calculate the total cost before sales tax:
The total cost before sales tax would be the sum of the cost of the first and second shirts, which is $32 + $30 = $62.

Step 6: Calculate the sales tax:
The sales tax is 4.5% of the total cost before tax.
So, the sales tax amount would be (4.5/100) * $62 = $2.79 (rounded to two decimal places).

Step 7: Calculate the total cost after sales tax:
The total cost after sales tax would be the sum of the total cost before tax and the sales tax amount, which is $62 + $2.79 = $64.79.

Therefore, Jim spent a total of $64.79 in all.

To calculate how much Jim spent in total after the discounts and sales tax, you can follow these steps:

Step 1: Calculate the discount amount for each shirt.
- The first shirt was discounted by 20%, so the discount amount is 20% of $40.
- 20% of $40 = (20/100) * $40 = $8.

- The second shirt was discounted by 25%, so the discount amount is 25% of $40.
- 25% of $40 = (25/100) * $40 = $10.

Step 2: Calculate the price of each shirt after the discount.
- Since the original price was $40 for each shirt, you subtract the discount amount from the original price to get the discounted price.
- The price of the first shirt after discount = $40 - $8 = $32.
- The price of the second shirt after discount = $40 - $10 = $30.

Step 3: Calculate the total price before sales tax.
- To find the total price before sales tax, you add the prices of both shirts after the discount.
- Total price before sales tax = $32 + $30 = $62.

Step 4: Calculate the sales tax amount.
- The sales tax is 4.5% of the total price before tax.
- Sales tax = (4.5/100) * $62 = $2.79 (approximated to two decimal places).

Step 5: Calculate the total price after sales tax.
- To find the final amount Jim spent, you add the total price before sales tax and the sales tax amount.
- Total price after sales tax = $62 + $2.79 = $64.79.

Therefore, Jim spent a total of $64.79 on the two shirts, including the discount and sales tax.