单选题 .  Shoppers who carefully plan their visit to the grocery store can save money on their grocery bills. Shopping when not     21    , sticking to their grocery list, and     22    a few simple rules will cut down the grocery bill.
    Shoppers should visit the grocery store on a full stomach by planning their trip     23    after a large meal. If that's not     24    , they should find something     25    to eat while preparing a grocery list. Most shoppers are less likely to buy extras when they are not troubled by     26    .
    Although having a list and     27    to it is the most important factor in saving money,     28    must prepare lists wisely in order to     29    . A carefully planned list should     30    in-season produce and any items on     31    or discounted through coupons. Many special buys are announced through the local newspapers, so buying the "grocery issue" is     32    the money you spend.     33    , it's important to remember that many newers, more expensive products first offered through coupons may not     34    enough savings for shoppers to give up products they usually buy.
    Now that the shopper has     35    the grocery list, it's time to leave for the store. However, no preparations are complete without a pocket calculator or a piece of paper and a     36    to figure costs.
    Once at the store, the shopper who wants to save money should follow a few more rules. The shopper should not stay     37    than necessary because bills go up each minute the shopper is in the store. So,     38    a time limit and a cost limit can hold down the     39    . Of course, the shopper should stick strictly to the     40    and not buy any extras. If the grocery list is a short one, shoppers can use the small hand-held basket instead of the roomy grocery cart.21.