What doctrine arose from cases in England in which parties, who had contracted for rooms along a parade route for the king's coronation, received their money back when the coronation was canceled because the king became ill?1) Frustration of purpose2) Commercial impracticability
3) Substantial performance
4) Anticipatory repudiation
5) Impossibility of performance

answer; i believe that the correct answer is ( secondary research); //

answer is i don't know

hi : ) i found this so i hope this !

"we first find value of tax in dollars.

the difference between the two prices   is: 23. 54 - 22 = 1.54

therefore the sales tax in dollars is 1.54

the tax % will be   (amount of tax / original cost price ) × 100

(1.54 / 22) × 100  → (0.07) × 100 =   7

so the tax rate is 7%

we can double check the answer.

7 % of 22   → (7/100) × 22 → 0.07 × 22 = 1.54

22 + 1.54 = 23.54"