When someone sees a new food product for sale in the supermarket, (21)make  ......... decision whether or not to buy it depends on various factors. Among the most important of these of course, are price and packaging. It is obvious that (22) ...the......... highly-priced product will not sell well. If a consumer is (23) ... familiar......... with two different brands of baked beans, one of which is twice as expensive as the other, he will probably choose the one which is cheaper. Nowadays, economic recession has made people even more reluctant to buy what (24) can............ be thought of as luxury items. Interestingly, however, (25) .....there...... is strong evidence to suggest that if the price of a product is too low, the effect on sales will be the same. (26) ..It.......... simply makes no difference whether the product is top quality or not. The public will not buy something it considers to be too cheap. Inevitably, this comes as a surprise to most people, but market research has shown it to be true. It goes without saying that the colour quality of the packaging also (27) ....plays ........ a vital role in the success or failure of a new product. For example, people tend to opt (28) how............ brands of frozen vegetables in green or blue packets rather than (29) ...tthose......... packaged in red or yellow. The implications of all these are obvious: it is essential that manufacturers and advertisers research the (30) .goods........... carefully before they launch a new product.