Moira is scrolling on Instagram and comes across a start-up candle company. The shipping cost for her order is a $5 flat fee plus ad additional $2.50 per candle purchased. The equation that calculates her total shipping cost, , is given by = 5 + 2.50, where is the number of candles she buys. Find two solutions that satisfy the equation and verbally interpret them. Make sure to include units.