Do all pyramids have a triangle base?

The two-way frequency table below shows data on playing a sport and playing a musical instrument for students in a class.

Answer this question! 30 points and brainliest! only if you know the answer.

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?