Could someone give me a step by step on how to solve this ? At a local restaurant, a couple ordered two dinners for $12.50 each and two drinks for $1.50 each. If the couple left an 18% tip, what was the total cost of the meal?

A3cm×3cm\greend{3\,\text{cm} \times 3\,\text{cm}} 3cm×3cm start color greend, 3, space, c, m, times, 3, space, c, m, end color greend rectangle sits inside a circle with radius of 4cm\blued{4\,\text{cm}} 4cm start color blued, 4, space, c, m, end color blued . what is the area of the shaded region? round your final answer to the nearest hundredth.