To find the total cost of the items before tax, we can use the formula for sales tax:
\[ \text{Sales tax} = \text{Total cost before tax} \times \text{Sales tax rate} \]
Let \( x \) be the total cost before tax. According to the information given:
\[ 4.28 = x \times 0.0625 \]
Now we can solve for \( x \):
\[ x = \frac{4.28}{0.0625} \]
Now let's calculate it:
\[ x = 4.28 \div 0.0625 \]
Calculating that:
\[ x = 68.48 \]
Thus, the total cost of the items before tax was $68.48.
So the answer is:
\[ \boxed{68.48} \]