Trighton's Trailer Co. sells all kinds of trailers and provides a one-year warranty on all new trailer sales. Based on history, Trighton anticipates that 2% of trailers will be returned and will have a warranty cost of $100 per trailer. During the month, Victor sold 300 trailers for a total of $255,000. At the end of the month, Trighton will record $ in warranty expense.

David consumes two things: gasoline (g) and bread (b). david's utility function is u(g, b) = 10g^0.25 b^0.75. use the lagrange technique to solve for david's optimal choices of gasoline and bread as a function of the price of gasoline, p_g, the price of bread, p_b, and his income m. with recent decrease in the price of gasoline (maybe due to external shock such as shale gas production) does david increase his consumption of gasoline? for david, how does partial differential g/partial differential p_g depend on his income m? that is, how does david's change in gasoline consumption due to an increase in the price of gasoline depend on his income level? to answer these questions, find the cross-partial derivative, |partial differential^2 g/partial differential m partial differential p_g.