Answer
$$Cost = 76 \space cents$$
Work Step by Step
1. Write the equalities to use as conversion factors:
$$48 \space pesos = 1 \space kg \space of \space avocados$$ $$2.20 \space lb = 1 \space kg*$$ $$13 \space pesos = 1 \space dollar$$ $$1 \space dollar = 100 \space cents$$
* See Table 2.7
2. Calculate the cost of an avocado that weighs 0.45 lb:
$$0.45 \space lb \times \frac{1 \space kg}{2.20 \space lb} \times \frac{48 \space pesos}{1 \space kg} \times \frac{1 \space dollar}{13 \space pesos} \times \frac{100 \space cents}{1 \space dollar}$$ $$= 76 \space cents$$
