Dale and his grandmother are baking two kinds of homemade bread. They use 5 grams of salt in their soda bread. In their whole wheat bread, they use 8 grams of salt. How much salt do they use in all?

To find the total amount of salt used in both kinds of bread, you can simply add the amounts of salt used in each type.

For the soda bread, they use 5 grams of salt.
For the whole wheat bread, they use 8 grams of salt.

Now, add these two amounts together:

\[
5 \text{ grams} + 8 \text{ grams} = 13 \text{ grams}
\]

Therefore, Dale and his grandmother use a total of 13 grams of salt in all.