The total number of cellular phones (both Nokia and Samsung) sold by store Q increased by 15% from October to November and the same of cellular phones sold by store T increased by 5% from October to November. What was the total number of cellular phones sold by store Q and T together in November?

Answer: Option C

Store	Nokia Cellular Phones	Samsung Cellular Phones	Total Number of Cellular Phones
P	896	672	1568
Q	840	280	1120
R	1120	896	2016
S	1568	1344	2912
T	448	1792	2240
U	704	640	1344

Number of cellular phones (both Nokia and Samsung) sold by store Q in October
= 11200 × $$\frac{10}{100}$$
= 1120
∵ Number of cellular phones (both Nokia and Samsung) sold by store Q in November
= 1120 × $$\frac{115}{100}$$
= 1288
Number of cellular phones (both Nokia and Samsung) sold by store T in October
= 11200 × $$\frac{20}{100}$$
= 2240
∵ Number of cellular phones (both Nokia and Samsung) sold by store T in November
= 2240 × $$\frac{105}{100}$$
= 2352
∵ Total number of cellular phones (both Nokia and Samsung) sold by Q and T together in November
= 1288 + 2352
= 3640