Question 248529
c = number of cones
110c = revenue generated by the sale of cones in cents
s = number of sundaes
235s = revenue generated by the sale of sundaes in cents
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110c + 235s = 29440 (given)
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And we have another fact:  
c + s = 170
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Two equations and two unknowns is solvable.
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We can easily determine c.
c = 170 - s
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Now substitute into the other equation.
110c + 235s = 29440
110(170-s) + 235s = 29440
18700 - 110s + 235s = 29440
125s = 10740
s = 85.92 sundaes sold
2.35s = 201.912
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c = 170 - s = 170 - 85.92
c = 84.08
1.10c = 92.488
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Total = 201.912 + 92.488 
Total =  294.4
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These are hard numbers to work with, but the answer checks.