The cost of 10 kg of mangos is equal to the cost of 24 kg of rice. The cost of 6 kg of flour equals the cost of 2 kg of rice. The cost of each kg of flour is $20.50. Find the total cost of 4 kg of mangos, 3 kg of rice and 5 kg of flour? Choose the correct choice from the following choices:
A) 347.4
B) 987.4
C) 877.4
D) 637.4
E) 667.4
C   $877.40   Let the costs of each kg of mangos and each kg of rice be $a and $r respectively.   10a = 24r and 6 * 20.50 = 2r   a = 12/5 r and r = 61.5   a = 147.6   Required total cost = 4 * 147.6 + 3 * 61.5 + 5 * 20.5   = 590.4 + 184.5 + 102.5= 
<gadget id="calculator">590.4 + 184.5 + 102.5</gadget>
<output>877.4</output>
$877.40
<result>C</result>
The cost of 10 kg of mangos is equal to the cost of 24 kg of rice. The cost of 6 kg of flour equals the cost of 2 kg of rice. The cost of each kg of flour is $20.50. Find the total cost of 4 kg of mangos, 3 kg of rice and 5 kg of flour?