 
<translate> Idan pizza mai matsakaici ya kai $18 kuma tare da tallace-tallace zan iya saya daya akan $5, to ina ceton $18 - $5 = $13 akan kowane pizza mai matsakaici. Idan na yi cikakken amfani da wannan talla, wannan yana nufin na sayi dukkan pizzas 3 masu matsakaici, saboda haka na adana jimillar 3 * $13 = $39 a duka. Saboda haka amsar karshe ita ce 39. <eng> If one medium pizza costs $18 and with the promotion I can buy one for $5, then I'm saving $18 - $5 = $13 on each medium pizza. If I take full advantage of the promotion, that means I bought all 3 medium pizzas, therefore I saved a total of 3 * $13 = $39 in total. So the final answer is 39. 