#include <stdio.h>

/* Money program */

int main () {
	double	DeutscheMarken, DMRate,	/* German currency variables */
		Dollars, 		/* US currency */
		Pounds, LBRate,		/* British currency */
		Francs, FFRate,		/* French currency */
		Rate, Amount, bucks;	/* input variables etc. */

	FILE	*f;			/* file pointer */
	char	unit, command;
	int	selling;		/* true if selling, false if buying */

	/* read the rates from the file */

	f = fopen ("money-info", "r");
	while (!feof (f)) {
		fscanf (f, "%c %lf %lf\n", &unit, &Rate, &Amount);
		printf ("%c %lf %lf\n", unit, Rate, Amount);
		switch (unit) {
			case 'U': 
				Dollars = Amount;
				break;
			case 'D':
				DMRate = Rate;
				DeutscheMarken = Amount;
				break;
			case 'B':
				Pounds = Amount;
				LBRate = Rate;
				break;
			case 'F':
				Francs = Amount;
				FFRate = Rate;
				break;
			default:
				printf ("huh?\n");
				break;
		}
	}
	fclose (f);

	/* process transactions while not end of file */

	while (!feof (stdin)) {
		scanf ("%c %c %lf", &command, &unit, &Amount);
		if (command == 'b') selling = 0; else selling = 1;
		switch (unit) {
			case 'D':
				bucks = DMRate * Amount;
				if (selling) {
					if (Dollars < bucks)
						printf ("not enough dollars, sorry.\n");
					else {
						printf ("customer selling %0.2lf German Marks, here is $%0.2lf\n", Amount, bucks);
						Dollars -= bucks;
						DeutscheMarken += Amount;
					}
				} else {
					if (DeutscheMarken - Amount < 0) {
						printf ("not enough German Marks, sorry.\n");
					} else {
						printf ("customer buying %0.2lf German Marks, that will be $%0.2lf, please.\n", Amount, bucks);
						DeutscheMarken -= Amount;
						Dollars += bucks;
					}
				}
				break;
			case 'F':
				bucks = FFRate * Amount;
				if (selling) {
					if (Dollars < bucks)
						printf ("not enough dollars, sorry.\n");
					else {
						printf ("customer selling %0.2lf French Francs, here is $%0.2lf\n", Amount, bucks);
						Dollars -= bucks;
						Francs += Amount;
					}
				} else {
					if (Francs - Amount < 0) {
						printf ("not enough French Francs, sorry.\n");
					} else {
						printf ("customer buying %0.2lf French Francs, that will be $%0.2lf, please.\n", Amount, bucks);
						Francs -= Amount;
						Dollars += bucks;
					}
				}
				break;
			case 'B':
				bucks = LBRate * Amount;
				if (selling) {
					if (Dollars < bucks)
						printf ("not enough dollars, sorry.\n");
					else {
						printf ("customer selling %0.2lf British Pounds, here is $%0.2lf\n", Amount, bucks);
						Dollars -= bucks;
						Pounds += Amount;
					}
				} else {
					if (Pounds - Amount < 0) {
						printf ("not enough British Pounds, sorry.\n");
					} else {
						printf ("customer buying %0.2lf British Pounds, that will be $%0.2lf, please.\n", Amount, bucks);
						Pounds -= Amount;
						Dollars += bucks;
					}
				}
				break;
			default:
				printf ("sorry, we don't sell that.\n");
				break;
		}
		scanf ("\n");
	}

	/* print ending balances */

	printf ("Ending Balances:\n");
	printf ("Dollars:\t%0.2lf\n", Dollars);
	printf ("German Marks:\t%0.2lf\n", DeutscheMarken);
	printf ("French Francs:\t%0.2lf\n", Francs);
	printf ("British Pounds:\t%0.2lf\n", Pounds);
	exit (0);
}