Multiply the first equation by 3: $ 21l + 15h = 361.50 $. Multiply the second equation by 5: $ 20l + 15h = 425.00 $. Subtract the first modified equation from the second: $ (20l + 15h) - (21l + 15h) = 425.00 - 361.50 \Rightarrow -l = 63.50 \Rightarrow l = -63.50 $. This negative value indicates an error in assumptions, suggesting a possible misinterpretation of the problem. However, if the equations are correct, the solution is $ \boxed-63.50 $, which is invalid in context. Rechecking the problem setup is advised. - Groen Casting