Answer: 15.68%
Step-by-step explanation:
Mr. Warner's cost of not taking the cash discount will be calculated as:
= (3%/100% - 3%) × (360/85 - 14)
= (3%/97%) × (360/71)
= 0.0309278 × 5.0704225
= 0.156817
= 15.68%
Mr. Warner's cost of not taking the cash discount is 15.68%