Compute the cost of not taking the following cash discounts. (Use a 360-day year. Do not round intermediate calculations. Input your final answers as a percent rounded to 2 decimal places.)

\begin{tabular}{|l|l|l|l|} \hline & & \multicolumn{2}{|c|}{ Cost of Lost Discount } \\ \hline a. & 2/18, net 50 & & % \\ \hline b. & 3/16, net 45 & & % \\ \hline c. & 4/19, net 45 & & % \\ \hline d. & 3/19, net 145 & & % \\ \hline \end{tabular}