Depict a small grocery shop, noticeable with a prominently displayed fruit and vegetable section. Present a Caucasian man, presumably the shop owner, busily stacking cucumbers onto the box crates. Do not forget to highlight a weighing scale nearby. The focus of the image should be on the cucumbers and symbolic representation of mathematics calculations, like an abstract image of a calculator and a chart indicating an increase of 30 percent. Remember, no text should be included in the image.

Adam buys 500kg of cucumber to sell in his shop. Based on previous record, there was 10% spoilt cucumber that can’t be sold. The price of the cucumber is set at RM 2.80 per kg in order to markup of 30% on overall cost. Calculate the cost price per kg.

First, we need to calculate the total amount of cucumber that will be sold after taking into account the spoiled cucumber:

Total amount of cucumber = 500kg
Spoilt cucumber = 10% of 500kg = 0.10 * 500 = 50kg
Good cucumber = 500kg - 50kg = 450kg

Next, we need to calculate the overall cost of the good cucumber:

Selling price per kg = RM 2.80
Markup = 30%
Cost price per kg = Selling price / (1 + Markup)
Cost price per kg = RM 2.80 / (1 + 0.30)
Cost price per kg = RM 2.80 / 1.30
Cost price per kg = RM 2.15

Finally, we calculate the total cost of the good cucumber:

Total cost = Cost price per kg * Amount of good cucumber
Total cost = RM 2.15 * 450kg
Total cost = RM 967.50

Therefore, the cost price per kg for the good cucumber that Adam will sell in his shop is RM 2.15.