At the Beginning of the Year, Kowalski Company Initiated a Quality

At the beginning of the year, Kowalski Company initiated a quality improvement program. The program was successful in reducing scrap and rework costs. To help assess the impact of the quality improvement program, the following data were collected for the current and preceding years: $\begin{array}{lrr}&\text { Freceding Year }&\text { Current Year }\\\text { Sales } & \$ 3,000,000 & \$ 3,000,000 \\\text { Quality training } & 3,000 & 4,500 \\\text { Material inspections } & 7,500 & 12,000 \\\text { Scrap } & 60,000 & 45,000 \\\text { Rework } & 120,000 & 75,000 \\\text { Product inspection } & 15,000 & 30,000 \\\text { Product warranty } & 105,000 & 82,500\end{array}$
For the current year, internal failure costs are what percentage of sales?

A) 4.00%
B) 2.90%
C) 2.50%
D) 1.50%