An architect must choose between installing a low-flow toilet (13 liters/flush) and an ultra-low flow toilet (6 liters/flush). The low-flow toilet will cost $90 while the ultra-low flow toilet costs $165. The cost of water is $1.75/350 liters and both toilets have a life of 10 years. Compute the present worth of both devices if interest is 10% and the average number of flushes is 12 flushes/day.

A) Compute the present worth of the low-flow toilet choice. Do not include a dollar sign in your answer.

B) Compute the present worth of the ultra low-flow toilet choice. Do not include a dollar sign in your answer.