A. It would be logical for Mary to buy the medication because if she contracts malaria she will be forced to use more money. The amount of money that she will use to buy the medicine is less than the amount of money she will use to treat malaria.
B.Preventive medication= ($50X2) + $400= $ 500
If she contracts malaria= $1500+ ($1000X2) + $2000 = $5500