Final answer:
The cost of one package of white chocolate chip cookie dough is $12, and the cost of one package of oatmeal cookie dough is $14.
Step-by-step explanation:
To solve this problem, let's assume the cost of one package of white chocolate chip cookie dough is 'x', and the cost of one package of oatmeal cookie dough is 'y'.
From the given information, we can set up two equations:
5x + 14y = 320
8x + 7y = 204
We can solve these equations using substitution or elimination method.
By solving these equations, we find that the cost of one package of white chocolate chip cookie dough is $12, and the cost of one package of oatmeal cookie dough is $14.