In a bakery, 40 sesame rings and 50 pastries are sold for a total of 100 TL. A sesame ring vendor gives 100 TL to the baker for 30 sesame rings and 50 pastries and receives A TL in change.
What is the total price of 1 sesame ring and 1 pastry in terms of A in TL?\\
A) $\frac { A + 20 } { 10 }$\\
B) $\frac { \mathrm { A } + 50 } { 10 }$\\
C) $\frac { A + 100 } { 50 }$\\
D) $\frac { 100 - A } { 50 }$\\
E) $\frac { 100 - A } { 50 - A }$