Answer:
120 pounds
Explanation:
The cost of refurbished phone after 35% off = 78.00 pounds
Let the cost of phone before the discount be x
x - (35% of x) = 78
x -
= 78
x - 0.35x = 78
0.65x = 78
x =

x = 120
The cost of phone before the discount would be 120 pounds.