How to request for quotation like if im having lunch for about 750 people and im interested in serving them with your delicious quarter leg chicken with chips

A few weeks ago i had to quickly make a big tray of chicken legs and thighs and had no time to be paying much attention to it.
Therefore I took a big oven bag and improvised a recipe. It came out delicious! Here is what i did:
I set the chicken (about 15 legs and thighs) in a big oven bag and i poured in it a half cup of olive oil and some spices (of each spice i spread around the amount of a teaspoon circa): black papper, tumeric, grill mix, sweet paprika and a bit of sugar and salt.
I also added some little diced potatoes and sweet potatoes, i closed the bag real tight and i started shaking it and making sure that all the oil and spices were covering every part of the chicken.
Then i set the bag on an aluminium tray (so that when it leaked it wouldn't stain the oven) and put it in the oven at about 160 degrees Celsius for about an hour until the chicken looked well cooked and the potatoes soft.
I suggest flipping the bag every once in a while so to mix the contents and allow the food to cook uniformly. I also suggest to avoid putting the bag too close to the sides of the oven and to it's top because it might burn little holes in the bag and leak.
The chicken cooked this way will stay moist and soft, and at the same time intensely tasty!
Bon Apetit!