At a certain bakery, each roll costs $r$ cents, and each doughnut costs $d$ cents. If Alfredo bought rolls and dough

At a certain bakery, each roll costs $r$ cents, and each doughnut costs $d$ cents. If Alfredo bought rolls and doughnuts at the bakery, how many cents did he pay for each roll?

(1) Alfredo paid $\$5.00$ for $8$ rolls and $6$ doughnuts.
(2) Alfredo would have paid $\$ 10.00$ if he had bought $16$ rolls and $12$ doughnuts.

Answer: E

Source: GMAT Prep

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