And in your example, the bike wasn't on the floor, so that specific tm was relevant to the purchase. What if no other tm or another competant tm was around? Guest leaves with no bike.
No. A TM is relevant. Not a specific TM. The only way the TM made a difference in sales is if absolutely no one else in the store would have gotten the bike. If even one other TM would have gotten that bike, then the TM who got it did not make any difference to sales for the day.
To qualify as having made a difference on the bottom line, to having made a difference in daily sales, you have to rise above all your peers and have made a sale that none of your peers could have made had they been there. Otherwise you are just another cog in the sales machine. You have to be special, or you are just part of working together for a combined goal.
When a woman wanted cleaning wipes to clean baby toys, and the other TM was stumped and asked me, was I special in selling pacifier wipes? Nope, because other experienced TMs likely would have, had they been there.
When another woman wanted white jeggings, and careful questioning revealed her daughter was wearing a somewhat sheer costume dress and I sold her on slip shorts, did I personally add to the bottom line? Nope, because other experienced TMs would have found a solution.
When I stopped thefts at the fitting room, and a few times it was a few hundred saved (I think the term was recovery), did I personally save the company money? Maybe the time that another TM waved sisters with cosmetics in and I gave the mom glare to the first woman who came out (and then went back in and came back out again with a full basket), since the other TM let the basket in. Otherwise, no, an experienced fitting room attendant would have been able to prevent similar losses.
No one is so much the retail demi-god that they can make sales no one else can and do so somewhat regularly. Any upsell anyone can do, there's probably quite a few more at their store that are just as good. So no one person increases daily sales by a noticeable amount. Any one person, any day, their efforts are statistically insignificant.