Explanation:
Pt A: (20) (30) + (15) (15) - 139
Pt B: The solution is correct because the gain made by a shop is gotten by subtracting the cost price $130 from the selling price
(20) (30) + (15)(15). Which yields:
(20)(30) + (15)(15) - 130
Pt C:
(20) (30) + (15) (15) - 130
= 600 ÷ 225 - 130
= 825 - 130
= 695
The value is:
695
Hope this helps!