Finding the optimal combination of two goods Janet enjoys consuming both guacamole and salsa. Each jar of guacamole costs PG=$1 , and each jar of salsa costs PS=$2 . Suppose that Janet buys 30 jars of guacamole and 20 jars of salsa per week. The following graphs show her marginal utility curves for guacamole and salsa. At her current consumption level, Janet's marginal utility from consuming the last jar of guacamole she bought is MUG=12 utils per jar, and her marginal utility from consuming the last jar of salsa she bought is MUS=12 utils per jar