To determine how much money the food pantry will spend, we first need to find out how many more cans of tomatoes they need after receiving the donations.
- Total cans needed: 1,021
- Cans received from donations: 689
Now, we calculate the remaining cans needed:
\[ \text{Remaining cans} = \text{Total cans needed} - \text{Cans received} = 1,021 - 689 = 332 \]
Next, we calculate the total cost for buying the remaining cans:
\[ \text{Cost per can} = 0.95 \]
\[ \text{Total cost} = \text{Remaining cans} \times \text{Cost per can} = 332 \times 0.95 \]
Calculating the total cost:
\[ 332 \times 0.95 = 315.4 \]
Since the question asks for an approximate amount of money they will spend, rounding $315.4 brings us closer to $300.
Therefore, the final answer is $300.