Ключевые слова: 50, business, buy, calculation of interest, char, character, cheap, cheapen, color, compounding, concept, cut price, date, deduction, digit, discount, discounts, evaluate, fifty, figure, half price, interest, interestfree, isolated, number, numeral, numeric, numerical symbols, per cent, percent, percentage, percentage point, rate, rate of interest, ratio, rebate, red, reduction, retail, retail sale, special offer, tally, white, without interest,