Total cost of croissants produced = $1.75 x 300 = $525
Total expected revenue = (100 + 45%)/100 x $525 = 1.45 x 525 = $761.25
Number of croissants expected to spoint = 0.10 x 300 = 30 croissants.
Number of croissants sold = 300 - 30 = 270 croisants.
Unit price of each croissant = $761.25/270 = $2.82
Therefore, each croissant should sell for $2.82